Obsolete Members in the .NET Framework 4

Article
02/04/2013

The following tables list the type members that have been declared obsolete based on the assembly in which they are found. The tables are organized as follows:

Obsolete Members in System Assemblies
- mscorlib.dll
- System.Core.dll
- System.Data.dll
- System.Data.Entity.dll
- System.Data.OracleClient.dll
- System.Design.dll
- System.dll
- System.Drawing.dll
- System.Messaging.dll
- System.ServiceModel.dll
- System.Web.DataVisualization.dll
- System.Web.dll
- System.Web.DynamicData.dll
- System.Web.Extensions.dll
- System.Web.Services.dll
- System.Windows.Forms.dll
- System.Xaml.dll
- System.Xml.dll
Obsolete Members in Microsoft Assemblies
- IEHost.dll and IEExec.exe
- ISymWrapper.dll
- Microsoft.Build.Conversion.v4.0.dll
- Microsoft.Build.Engine.dll
- Microsoft.VisualBasic.dll

Obsolete Members in System Assemblies

The following tables list the obsolete members in system assemblies. These assemblies are used for general-purpose application development that targets the .NET Framework.

mscorlib.dll

Type	Member	Message
System.Enum	ToString(IFormatProvider)	The provider argument is not used. Please use Enum.ToString().
System.Enum	ToString(String, IFormatProvider)	The provider argument is not used. Please use Enum.ToString().
System.Activator	CreateInstance(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Activator.CreateInstance which does not take an System.Security.Policy.Evidence parameter.
System.Activator	CreateInstanceFrom(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Activator.CreateInstanceFrom which does not take an System.Security.Policy.Evidence parameter.
System.Activator	CreateInstanceFrom(AppDomain, String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)	Methods which use Evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Activator.CreateInstanceFrom that does not take an System.Security.Policy.Evidence parameter.
System.Activator	CreateInstance(AppDomain, String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Activator.CreateInstance that does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	CreateInstanceFromAndUnwrap(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.CreateInstanceFromAndUnwrap that does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	ExecuteAssembly(String, Evidence, String[], Byte[], AssemblyHashAlgorithm)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.ExecuteAssembly that does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	SetAppDomainPolicy	AppDomain policy levels are obsolete and will be removed in a future release of the .NET Framework.
System.AppDomain	ExecuteAssemblyByName(AssemblyName, Evidence, String[])	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.ExecuteAssemblyByName which does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	Load(Byte[], Byte[], Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.Load which does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	ExecuteAssembly(String, Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.ExecuteAssembly which does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	AppendPrivatePath	AppendPrivatePath has been deprecated. Please investigate the use of AppDomainSetup.PrivateBinPath instead.
System.AppDomain	CreateInstanceAndUnwrap(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.CreateInstanceFromAndUnwrap which does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	Load(String, Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.Load which does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	ClearShadowCopyPath	ClearShadowCopyPath has been deprecated. Please investigate the use of AppDomainSetup.ShadowCopyDirectories instead.
System.AppDomain	Load(AssemblyName, Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.Load which does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	SetCachePath	SetCachePath has been deprecated. Please investigate the use of AppDomainSetup.CachePath instead.
System.AppDomain	CreateInstance(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.CreateInstance that does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	DefineDynamicAssembly(AssemblyName, AssemblyBuilderAccess, String, Evidence, PermissionSet, PermissionSet, PermissionSet, Boolean)	Assembly level declarative security is obsolete and is no longer enforced by the CLR by default.
System.AppDomain	SetShadowCopyFiles	SetShadowCopyFiles has been deprecated. Please investigate the use of AppDomainSetup.ShadowCopyFiles instead.
System.AppDomain	ExecuteAssemblyByName(String, Evidence, String[])	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.ExecuteAssemblyByName that does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	DefineDynamicAssembly(AssemblyName, AssemblyBuilderAccess, Evidence)	Assembly level declarative security is obsolete and is no longer enforced by the CLR by default.
System.AppDomain	ClearPrivatePath	ClearPrivatePath has been deprecated. Please investigate the use of AppDomainSetup.PrivateBinPath instead.
System.AppDomain	ExecuteAssembly(String, Evidence, String[])	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.ExecuteAssembly which does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	DefineDynamicAssembly(AssemblyName, AssemblyBuilderAccess, PermissionSet, PermissionSet, PermissionSet)	Assembly level declarative security is obsolete and is no longer enforced by the CLR by default.
System.AppDomain	DefineDynamicAssembly(AssemblyName, AssemblyBuilderAccess, String, Evidence, PermissionSet, PermissionSet, PermissionSet, Boolean, IEnumerable<CustomAttributeBuilder>)	Assembly level declarative security is obsolete and is no longer enforced by the CLR by default.
System.AppDomain	DefineDynamicAssembly(AssemblyName, AssemblyBuilderAccess, String, Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.DefineDynamicAssembly that does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	CreateInstanceFrom(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.CreateInstanceFrom that does not take an System.Security.Policy.Evidence parameter.
System.AppDomain	GetCurrentThreadId	GetCurrentThreadId has been deprecated because it does not provide a stable Id when managed threads are running on fibers (aka lightweight threads). To get a stable identifier for a managed thread, use the Thread.ManagedThreadId property.
System.AppDomain	SetDynamicBase	SetDynamicBase has been deprecated. Please investigate the use of AppDomainSetup.DynamicBase instead.
System.AppDomain	DefineDynamicAssembly(AssemblyName, AssemblyBuilderAccess, String, PermissionSet, PermissionSet, PermissionSet)	Assembly level declarative security is obsolete and is no longer enforced by the CLR by default.
System.AppDomain	SetShadowCopyPath	SetShadowCopyPath has been deprecated. Please investigate the use of AppDomainSetup.ShadowCopyDirectories instead.
System.AppDomain	DefineDynamicAssembly(AssemblyName, AssemblyBuilderAccess, Evidence, PermissionSet, PermissionSet, PermissionSet)	Assembly level declarative security is obsolete and is no longer enforced by the CLR by default.
System.AppDomain	DefineDynamicAssembly(AssemblyName, AssemblyBuilderAccess, String, Evidence, PermissionSet, PermissionSet, PermissionSet)	Assembly level declarative security is obsolete and is no longer enforced by the CLR by default.
System.AppDomain	ExecuteAssemblyByName(String, Evidence)	Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of AppDomain.ExecuteAssemblyByName that does not take an System.Security.Policy.Evidence parameter.
System.LoaderOptimization	DomainMask	This method has been deprecated. Please use Assembly.Load instead.
System.LoaderOptimization	DisallowBindings	This method has been deprecated. Please use Assembly.Load instead.
System.Threading.WaitHandle	Handle	Use the WaitHandle.SafeWaitHandle property instead.
System.Threading.Overlapped	EventHandle	This property is not 64-bit compatible. Use Overlapped.EventHandleIntPtr instead.
System.Threading.Overlapped	Pack(IOCompletionCallback)	This method is not safe. Use Overlapped.Pack(IOCompletionCallback, Object) instead.
System.Threading.Overlapped	Overlapped(Int32, Int32, Int32, IAsyncResult)	This constructor is not 64-bit compatible. Use the Overlapped.Overlapped(Int32, Int32, IntPtr, IAsyncResult) constructor that takes an System.IntPtr for the event handle.
System.Threading.Overlapped	UnsafePack(IOCompletionCallback)	This method is not safe. Use Overlapped.UnsafePack(IOCompletionCallback, Object) instead.
System.Threading.Thread	Resume	Resume has been deprecated. Please use other classes in System.Threading, such as Monitor, Mutex , Event, and Semaphore, to synchronize threads or protect resources.
System.Threading.Thread	SetCompressedStack	SetCompressedStack is no longer supported. Please use the System.Threading.CompressedStack class.
System.Threading.Thread	GetCompressedStack	GetCompressedStack is no longer supported. Please use the System.Threading.CompressedStack class.
System.Threading.Thread	ApartmentState	The ApartmentState property has been deprecated. Use Thread.GetApartmentState, Thread.SetApartmentState or Thread.TrySetApartmentState instead.
System.Threading.Thread	Suspend	Suspend has been deprecated. Please use other classes in System.Threading, such as Monitor, Mutex , Event, and Semaphore, to synchronize threads or protect resources.
System.Threading.ThreadPool	BindHandle(IntPtr)	BindHandle(IntPtr) has been deprecated. Please use ThreadPool.BindHandle(SafeHandle) instead.
System.Collections.Hashtable	Hashtable(IDictionary, Single, IHashCodeProvider, IComparer)	Please use Hashtable.Hashtable(IDictionary, Single, IEqualityComparer) instead.
System.Collections.Hashtable	Hashtable(IDictionary, IHashCodeProvider, IComparer)	Please use Hashtable.Hashtable(IDictionary, IEqualityComparer) instead.
System.Collections.Hashtable	Hashtable(Int32, IHashCodeProvider, IComparer)	Please use Hashtable.Hashtable(Int32, IEqualityComparer) instead.
System.Collections.Hashtable	Hashtable(IHashCodeProvider, IComparer)	Please use Hashtable.Hashtable(IEqualityComparer) instead.
System.Collections.Hashtable	Hashtable(Int32, Single, IHashCodeProvider, IComparer)	Please use Hashtable.Hashtable(Int32, Single, IEqualityComparer) instead.
System.Diagnostics.Debugger	Debugger	Do not create instances of the Debugger class. Call the static methods directly on this type instead.
System.Diagnostics.SymbolStore.ISymbolBinder	GetReader	The recommended alternative is ISymbolBinder1.GetReader, which takes the importer interface pointer as an IntPtr instead of an Int32, and thus works on both 32-bit and 64-bit architectures.
System.Reflection.Assembly	Load(String, Evidence)	This method is obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Assembly.Load that does not take an System.Security.Policy.Evidence parameter.
System.Reflection.Assembly	LoadWithPartialName(String)	This method has been deprecated. Please use Assembly.Load instead.
System.Reflection.Assembly	LoadWithPartialName(String, Evidence)	This method has been deprecated. Please use Assembly.Load instead.
System.Reflection.Assembly	Load(Byte[], Byte[], Evidence)	This method is obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Assembly.Load that does not take an System.Security.Policy.Evidence parameter.
System.Reflection.Assembly	Load(AssemblyName, Evidence)	This method is obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Assembly.Load that does not take an System.Security.Policy.Evidence parameter.
System.Reflection.Assembly	LoadFrom(String, Evidence)	This method is obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Assembly.LoadFrom which does not take an System.Security.Policy.Evidence parameter.
System.Reflection.Assembly	LoadFile(String, Evidence)	This method is obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Assembly.LoadFile which does not take an System.Security.Policy.Evidence parameter.
System.Reflection.Assembly	LoadFrom(String, Evidence, Byte[], AssemblyHashAlgorithm)	This method is obsolete and will be removed in a future release of the .NET Framework. Please use an overload of Assembly.LoadFrom which does not take an System.Security.Policy.Evidence parameter.
System.Reflection.AssemblyFlagsAttribute	AssemblyFlagsAttribute(Int32)	This constructor has been deprecated. Please use AssemblyFlagsAttribute.AssemblyFlagsAttribute(AssemblyNameFlags) instead.
System.Reflection.AssemblyFlagsAttribute	AssemblyFlagsAttribute(UInt32)	This constructor has been deprecated. Please use AssemblyFlagsAttribute.AssemblyFlagsAttribute(AssemblyNameFlags) instead.
System.Reflection.AssemblyFlagsAttribute	Flags	This property has been deprecated. Please use AssemblyFlagsAttribute.AssemblyFlags instead.
System.Globalization.CultureTypes	FrameworkCultures	This value has been deprecated. Please use other values in System.Globalization.CultureTypes.
System.Globalization.CultureTypes	WindowsOnlyCultures	This value has been deprecated. Please use other values in System.Globalization.CultureTypes.
Microsoft.Win32.Registry	DynData	The DynData registry key only works on Win9x, which is no longer supported by the CLR. On NT-based operating systems, use the Registry.PerformanceData registry key instead.
System.Security.Policy.Evidence	AddAssembly	This method is obsolete. Please use Evidence.AddAssemblyEvidence<T> instead.
System.Security.Policy.Evidence	CopyTo	Evidence should not be treated as an System.Collections.ICollection. Please use the Evidence.GetHostEnumerator and Evidence.GetAssemblyEnumerator methods rather than using CopyTo.
System.Security.Policy.Evidence	Count	Evidence should not be treated as an System.Collections.ICollection. Please use Evidence.GetHostEnumerator and Evidence.GetAssemblyEnumerator to iterate over the evidence to collect a count.
System.Security.Policy.Evidence	AddHost	This method is obsolete. Please use Evidence.AddHostEvidence<T> instead.
System.Security.Policy.Evidence	GetEnumerator	GetEnumerator is obsolete. Please use Evidence.GetHostEnumerator and Evidence.GetAssemblyEnumerator instead.
System.Security.Policy.Evidence	Evidence(Object[], Object[])	This constructor is obsolete. Please use the Evidence.Evidence(EvidenceBase[], EvidenceBase[]) constructor instead.
System.Security.Policy.PolicyLevel	CreateAppDomainLevel	AppDomain policy levels are obsolete and will be removed in a future release of the .NET Framework.
System.Security.Policy.PolicyLevel	RemoveFullTrustAssembly(StrongNameMembershipCondition)	Because all GAC assemblies always get full trust, the full trust list is no longer meaningful. You should install any assemblies that are used in security policy in the GAC to ensure they are trusted.
System.Security.Policy.PolicyLevel	FullTrustAssemblies	Because all GAC assemblies always get full trust, the full trust list is no longer meaningful. You should install any assemblies that are used in security policy in the GAC to ensure they are trusted.
System.Security.Policy.PolicyLevel	AddFullTrustAssembly(StrongName)	Because all GAC assemblies always get full trust, the full trust list is no longer meaningful. You should install any assemblies that are used in security policy in the GAC to ensure they are trusted.
System.Security.Policy.PolicyLevel	AddFullTrustAssembly(StrongNameMembershipCondition)	Because all GAC assemblies always get full trust, the full trust list is no longer meaningful. You should install any assemblies that are used in security policy in the GAC to ensure they are trusted.
System.Security.Policy.PolicyLevel	RemoveFullTrustAssembly(StrongName)	Because all GAC assemblies always get full trust, the full trust list is no longer meaningful. You should install any assemblies that are used in security policy in the GAC to ensure they are trusted.
System.Runtime.InteropServices.Marshal	GetThreadFromFiberCookie	The GetThreadFromFiberCookie method has been deprecated. Use the hosting API to perform this operation.
System.Runtime.InteropServices.Marshal	ReleaseThreadCache	This API did not perform any operation and will be removed in future versions of the CLR.
System.Runtime.InteropServices.Marshal	GetManagedThunkForUnmanagedMethodPtr	The GetManagedThunkForUnmanagedMethodPtr method has been deprecated and will be removed in a future release.
System.Runtime.InteropServices.Marshal	GetTypeInfoName(UCOMITypeInfo)	Use Marshal.GetTypeInfoName(ITypeInfo) instead.
System.Runtime.InteropServices.Marshal	GetTypeLibLcid(UCOMITypeLib)	Use Marshal.GetTypeLibLcid(ITypeLib) instead.
System.Runtime.InteropServices.Marshal	GetTypeLibName(UCOMITypeLib)	Use Marshal.GetTypeLibName(ITypeLib) instead.
System.Runtime.InteropServices.Marshal	GetTypeLibGuid(UCOMITypeLib)	Use Marshal.GetTypeLibGuid(ITypeLib) instead.
System.Runtime.InteropServices.Marshal	GetUnmanagedThunkForManagedMethodPtr	The GetUnmanagedThunkForManagedMethodPtr method has been deprecated and will be removed in a future release.
System.Runtime.InteropServices.RuntimeEnvironment	RuntimeEnvironment	Do not create instances of the System.Runtime.InteropServices.RuntimeEnvironment class. Call the static methods directly on this type instead.
System.IO.FileStream	FileStream(IntPtr, FileAccess, Boolean, Int32, Boolean)	This constructor has been deprecated. Please use FileStream.FileStream(SafeFileHandle, FileAccess, Int32, Boolean) instead, and optionally make a new Microsoft.Win32.SafeHandles.SafeFileHandle with ownsHandle=false if needed.
System.IO.FileStream	FileStream(IntPtr, FileAccess)	This constructor has been deprecated. Please use FileStream.FileStream(SafeFileHandle, FileAccess) instead.
System.IO.FileStream	Handle	This property has been deprecated. Please use the FileStream.SafeFileHandle property instead.
System.IO.FileStream	FileStream(IntPtr, FileAccess, Boolean, Int32)	This constructor has been deprecated. Please use FileStream.FileStream(SafeFileHandle, FileAccess, Int32) instead, and optionally make a new Microsoft.Win32.SafeHandles.SafeFileHandle with ownsHandle=false if needed.
System.IO.FileStream	FileStream(IntPtr, FileAccess, Boolean)	This constructor has been deprecated. Please use FileStream.FileStream(SafeFileHandle, FileAccess) instead, and optionally make a new Microsoft.Win32.SafeHandles.SafeFileHandle with ownsHandle=false if needed.
System.IO.Path	InvalidPathChars	Please use Path.GetInvalidPathChars or Path.GetInvalidFileNameChars instead.
System.Security.CodeAccessPermission	RevertDeny	Deny is obsolete and will be removed in a future release of the .NET Framework.
System.Security.CodeAccessPermission	Deny	Deny is obsolete and will be removed in a future release of the .NET Framework.
System.Security.Permissions.SecurityAction	Deny	Deny is obsolete and will be removed in a future release of the .NET Framework.
System.Security.Permissions.SecurityAction	RequestRefuse	Assembly level declarative security is obsolete and is no longer enforced by the CLR by default.
System.Security.Permissions.SecurityAction	RequestMinimum	Assembly level declarative security is obsolete and is no longer enforced by the CLR by default.
System.Security.Permissions.SecurityAction	RequestOptional	Assembly level declarative security is obsolete and is no longer enforced by the CLR by default.
System.Security.Permissions.FileIOPermissionAttribute	All	Please use the FileIOPermissionAttribute.ViewAndModify property instead.
System.Security.Permissions.ReflectionPermissionAttribute	TypeInformation	This API has been deprecated.
System.Security.Permissions.ReflectionPermissionAttribute	ReflectionEmit	This permission is no longer used by the CLR.
System.Security.Permissions.RegistryPermissionAttribute	All	Please use the RegistryPermissionAttribute.ViewAndModify property instead.
System.Security.Permissions.ReflectionPermissionFlag	TypeInformation	This API has been deprecated.
System.Security.Permissions.ReflectionPermissionFlag	AllFlags	This permission has been deprecated. Use PermissionState.Unrestricted to get full access.
System.Security.Permissions.ReflectionPermissionFlag	ReflectionEmit	This permission is no longer used by the CLR.
System.Security.SecurityCriticalAttribute	Scope	System.Security.SecurityCriticalScope is only used for .NET 2.0 transparency compatibility.
System.Security.HostSecurityManagerOptions	HostPolicyLevel	AppDomain policy levels are obsolete and will be removed in a future release of the .NET Framework.
System.Security.HostSecurityManager	DomainPolicy	AppDomain policy levels are obsolete and will be removed in a future release of the .NET Framework.
System.Security.PermissionSet	ConvertPermissionSet	This method is obsolete and should no longer be used.
System.Security.PermissionSet	Deny	Deny is obsolete and will be removed in a future release of the .NET Framework.
System.Security.SecurityManager	SecurityEnabled	Because security can no longer be turned off, the SecurityEnabled property no longer has any effect.
System.Security.SecurityManager	SavePolicy	This method is obsolete and will be removed in a future release of the .NET Framework.
System.Security.SecurityManager	LoadPolicyLevelFromFile	This method is obsolete and will be removed in a future release of the .NET Framework.
System.Security.SecurityManager	ResolvePolicy(Evidence, PermissionSet, PermissionSet, PermissionSet, PermissionSet	This method is obsolete and will be removed in a future release of the .NET Framework.
System.Security.SecurityManager	ResolvePolicy(Evidence)	This method is obsolete and will be removed in a future release of the .NET Framework.
System.Security.SecurityManager	PolicyHierarchy	This method is obsolete and will be removed in a future release of the .NET Framework.
System.Security.SecurityManager	ResolvePolicy(Evidence[])	This method is obsolete and will be removed in a future release of the .NET Framework.
System.Security.SecurityManager	CheckExecutionRights	Because execution permission checks can no longer be turned off, the CheckExecutionRights property no longer has any effect.
System.Security.SecurityManager	ResolvePolicyGroups	This method is obsolete and will be removed in a future release of the .NET Framework.
System.Security.SecurityManager	IsGranted	IsGranted is obsolete and will be removed in a future release of the .NET Framework. Please use either the AppDomain.PermissionSet or the Assembly.PermissionSet property instead.
System.Security.SecurityManager	LoadPolicyLevelFromString	This method is obsolete and will be removed in a future release of the .NET Framework.
System.Security.SecurityManager	ResolveSystemPolicy	This method is obsolete and will be removed in a future release of the .NET Framework.
System.Security.SecurityManager	SavePolicyLevel	This method is obsolete and will be removed in a future release of the .NET Framework.
System.Runtime.Remoting.Channels.ChannelServices	RegisterChannel	Use ChannelServices.RegisterChannel instead.
System.Runtime.Remoting.Lifetime.LifetimeServices	LifetimeServices	Do not create instances of the LifetimeServices class. Call the static methods directly on this type instead
System.Runtime.Remoting.RemotingConfiguration	Configure(String)	Use RemotingConfiguration.Configure(String, Boolean) instead.
System.Runtime.Remoting.RemotingServices	LogRemotingStage	Use of this method is not recommended. The LogRemotingStage existed for internal diagnostic purposes only.
System.IO.IsolatedStorage.IsolatedStorage	CurrentSize	CurrentSize has been deprecated because it is not CLS Compliant. To get the current size use IsolatedStorage.UsedSize.
System.IO.IsolatedStorage.IsolatedStorage	MaximumSize	MaximumSize has been deprecated because it is not CLS Compliant. To get the maximum size use IsolatedStorage.Quota.
System.IO.IsolatedStorage.IsolatedStorageFileStream	Handle	This property has been deprecated. Please use the IsolatedStorageFileStream.SafeFileHandle property instead.
System.IO.IsolatedStorage.IsolatedStorageFile	CurrentSize	CurrentSize has been deprecated because it is not CLS Compliant. To get the current size use UsedSize.
System.IO.IsolatedStorage.IsolatedStorageFile	MaximumSize	MaximumSize has been deprecated because it is not CLS Compliant. To get the maximum size use IsolatedStorageFile.Quota.
System.Reflection.Emit.ConstructorBuilder	ReturnType	This property has been deprecated.
System.Reflection.Emit.FieldBuilder	SetMarshal	An alternate API is available: Emit the System.Runtime.InteropServices.MarshalAsAttribute custom attribute instead.
System.Reflection.Emit.MethodBuilder	SetMarshal	An alternate API is available: Emit the System.Runtime.InteropServices.MarshalAsAttribute custom attribute instead.
System.Reflection.Emit.OpCodeType	Annotation	This API has been deprecated.
System.Reflection.Emit.OperandType	InlinePhi	This API has been deprecated.
System.Reflection.Emit.FlowControl	Phi	This API has been deprecated.
System.Reflection.Emit.ParameterBuilder	SetMarshal	An alternate API is available: Emit the System.Runtime.InteropServices.MarshalAsAttribute custom attribute instead.
System.Configuration.Assemblies.AssemblyHash	AssemblyHash(AssemblyHashAlgorithm, Byte[])	The System.Configuration.Assemblies.AssemblyHash class has been deprecated.
System.Configuration.Assemblies.AssemblyHash	Algorithm	The System.Configuration.Assemblies.AssemblyHash class has been deprecated.
System.Configuration.Assemblies.AssemblyHash	AssemblyHash(Byte[])	The System.Configuration.Assemblies.AssemblyHash class has been deprecated.
System.Configuration.Assemblies.AssemblyHash	Empty	The System.Configuration.Assemblies.AssemblyHash class has been deprecated.
System.Configuration.Assemblies.AssemblyHash	Clone	The System.Configuration.Assemblies.AssemblyHash class has been deprecated.
System.Configuration.Assemblies.AssemblyHash	SetValue	The System.Configuration.Assemblies.AssemblyHash class has been deprecated.
System.Configuration.Assemblies.AssemblyHash	GetValue	The System.Configuration.Assemblies.AssemblyHash class has been deprecated.
System.Security.Cryptography.PasswordDeriveBytes	GetBytes	System.Security.Cryptography.Rfc2898DeriveBytes replaces System.Security.Cryptography.PasswordDeriveBytes for deriving key material from a password and is preferred in new applications.
System.Security.Cryptography.X509Certificates.X509Certificate	GetIssuerName	This method has been deprecated. Please use the X509Certificate.Issuer property instead.
System.Security.Cryptography.X509Certificates.X509Certificate	GetName	This method has been deprecated. Please use the X509Certificate.Subject property instead.

System.Core.dll

Type	Member	Message
System.Linq.ParallelEnumerable	GroupJoin<TOuter, TInner, TKey, TResult>(ParallelQuery<TOuter>, IEnumerable<TInner>, Func<TOuter, TKey>, Func<TInner, TKey>, Func<TOuter, IEnumerable<TInner>, TResult>, IEqualityComparer<TKey>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	Union<TSource>(ParallelQuery<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	Except<TSource>(ParallelQuery<TSource>, IEnumerable<TSource>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	Zip	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	GroupJoin<TOuter, TInner, TKey, TResult>(ParallelQuery<TOuter>, IEnumerable<TInner>, Func<TOuter, TKey>, Func<TInner, TKey>, Func<TOuter, IEnumerable<TInner>, TResult>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	Union<TSource>(ParallelQuery<TSource>, IEnumerable<TSource>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	Intersect<TSource>(ParallelQuery<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	Intersect<TSource>(ParallelQuery<TSource>, IEnumerable<TSource>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	Concat<TSource>(ParallelQuery<TSource>, IEnumerable<TSource>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	SequenceEqual<TSource>(ParallelQuery<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	SequenceEqual<TSource>(ParallelQuery<TSource>, IEnumerable<TSource>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	Join<TOuter, TInner, TKey, TResult>(ParallelQuery<TOuter>, IEnumerable<TInner>, Func<TOuter, TKey>, Func<TInner, TKey>, Func<TOuter, TInner, TResult>, IEqualityComparer<TKey>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	Join<TOuter, TInner, TKey, TResult>(ParallelQuery<TOuter>, IEnumerable<TInner>, Func<TOuter, TKey>, Func<TInner, TKey>, Func<TOuter, TInner, TResult>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Linq.ParallelEnumerable	Except<TSource>(ParallelQuery<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)	The second data source of a binary operator must be of type System.Linq.ParallelQuery<TSource> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel<TSource>(IEnumerable<TSource>) extension method to convert the right data source to System.Linq.ParallelQuery<TSource>.
System.Runtime.CompilerServices.CallSiteOps	GetMatch	Do not use this method.
System.Runtime.CompilerServices.CallSiteOps	GetCachedRules<T>(RuleCache<T>)	Do not use this method.
System.Runtime.CompilerServices.CallSiteOps	AddRule<T>	Do not use this method.
System.Runtime.CompilerServices.CallSiteOps	ClearMatch	Do not use this method.
System.Runtime.CompilerServices.CallSiteOps	UpdateRules<T>	Do not use this method.
System.Runtime.CompilerServices.CallSiteOps	Bind<T>	Do not use this method.
System.Runtime.CompilerServices.CallSiteOps	CreateMatchmaker<T>	Do not use this method.
System.Runtime.CompilerServices.CallSiteOps	SetNotMatched	Do not use this method.
System.Runtime.CompilerServices.CallSiteOps	GetRules<T>	Do not use this method.
System.Runtime.CompilerServices.CallSiteOps	GetRuleCache<T>	Do not use this method.
System.Runtime.CompilerServices.CallSiteOps	MoveRule<T>(RuleCache<T>, T, Int32)	Do not use this method.
System.Runtime.CompilerServices.RuntimeOps	ExpandoTryGetValue	Do not use this method.
System.Runtime.CompilerServices.RuntimeOps	ExpandoCheckVersion	Do not use this method.
System.Runtime.CompilerServices.RuntimeOps	CreateRuntimeVariables(Object[], Int64[])	Do not use this method.
System.Runtime.CompilerServices.RuntimeOps	ExpandoPromoteClass	Do not use this method.
System.Runtime.CompilerServices.RuntimeOps	ExpandoTryDeleteValue	Do not use this method.
System.Runtime.CompilerServices.RuntimeOps	ExpandoTrySetValue	Do not use this method.
System.Runtime.CompilerServices.RuntimeOps	Quote	Do not use this method.
System.Runtime.CompilerServices.RuntimeOps	MergeRuntimeVariables	Do not use this method.
System.Runtime.CompilerServices.RuntimeOps	CreateRuntimeVariables()	Do not use this method.

System.Data.dll

Type	Member	Message
System.Data.DataSysDescriptionAttribute	DataSysDescriptionAttribute	DataSysDescriptionAttribute has been deprecated.
System.Data.Odbc.OdbcParameterCollection	Add(String, Object)	Add(String, Object) has been deprecated. Use OdbcParameterCollection.AddWithValue(String, Object).
System.Data.Odbc.OdbcPermission	OdbcPermission()	OdbcPermission() has been deprecated. Use the OdbcPermission(PermissionState.None) constructor.
System.Data.Odbc.OdbcPermission	OdbcPermission(PermissionState, Boolean)	OdbcPermission(PermissionState, Boolean) has been deprecated. Use the OdbcPermission(PermissionState.None) constructor.
System.Data.OleDb.OleDbParameterCollection	Add(String, Object)	Add(String, Object) has been deprecated. Use OleDbParameterCollection.AddWithValue).
System.Data.OleDb.OleDbPermission	OleDbPermission()	OleDbPermission() has been deprecated. Use the OleDbPermission(PermissionState.None) constructor.
System.Data.OleDb.OleDbPermission	OleDbPermission(PermissionState, Boolean)	OleDbPermission(PermissionState, Boolean) has been deprecated. Use the OleDbPermission(PermissionState.None) constructor.
System.Data.OleDb.OleDbPermission	Provider	The Provider property has been deprecated. Use the Add method.
System.Data.OleDb.OleDbPermissionAttribute	Provider	The Provider property has been deprecated. Use the Add method.
System.Data.SqlClient.SqlClientPermission	SqlClientPermission()	SqlClientPermission() has been deprecated. Use the SqlClientPermission(PermissionState.None) constructor.
System.Data.SqlClient.SqlClientPermission	SqlClientPermission(PermissionState, Boolean)	SqlClientPermission(PermissionState, Boolean) has been deprecated. Use the SqlClientPermission(PermissionState.None) constructor.
System.Data.SqlClient.SqlConnectionStringBuilder	ConnectionReset	ConnectionReset has been deprecated. System.Data.SqlClient.SqlConnection will ignore the 'connection reset' keyword and always reset the connection.
System.Data.SqlClient.SqlParameterCollection	Add(String, Object)	Add(String, Object) has been deprecated. Use SqlParameterCollection.AddWithValue).

System.Data.Entity.dll

Type	Member	Message
System.Data.Metadata.Edm.AssociationSetEnd	Role	This property is going away, please use the AssociationSetEnd.Name property instead.
System.Data.Objects.ObjectContext	ApplyPropertyChanges	Use ObjectContext.ApplyCurrentValues<TEntity> instead.
System.Data.Objects.ObjectContext	SaveChanges(Boolean)	Use SaveChanges(SaveOptions) instead.

System.Data.OracleClient.dll

Type	Member	Message
System.Data.OracleClient.OracleParameter	Scale	Scale has been deprecated. Use the System.Math classes to explicitly set the scale of a decimal.
System.Data.OracleClient.OracleParameter	Precision	Precision has been deprecated. Use the System.Math classes to explicitly set the precision of a decimal.
System.Data.OracleClient.OracleParameterCollection	Add(String, Object)	Add(String, Object) has been deprecated. Use OracleParameterCollection.AddWithValue).

System.Design.dll

Type	Member	Message
System.ComponentModel.Design.ComponentDesigner	OnSetComponentDefaults	This method has been deprecated. Use ComponentDesigner.InitializeNewComponent instead.
System.ComponentModel.Design.ComponentDesigner	InitializeNonDefault	This method has been deprecated. Use ComponentDesigner.InitializeExistingComponent instead.
System.Windows.Forms.Design.ControlDesigner	OnSetComponentDefaults	This method has been deprecated. Use ControlDesigner.InitializeNewComponent instead.
System.Web.UI.Design.HtmlControlDesigner	ShouldCodeSerialize	Use of this property is not recommended because code serialization is not supported.
System.Web.UI.Design.HtmlControlDesigner	Behavior	The recommended alternative is ControlDesigner.Tag.
System.Web.UI.Design.ControlDesigner	ReadOnly	The recommended alternative is to inherit from System.Web.UI.Design.ContainerControlDesigner instead and to use an System.Web.UI.Design.EditableDesignerRegion. Regions allow for better control of the content in the designer.
System.Web.UI.Design.ControlDesigner	IsPropertyBound	The recommended alternative is System.Web.UI.Design.ControlDesigner.DataBindings.Contains. The System.Web.UI.DataBindingCollection class allows more control of the data bindings associated with the control.
System.Web.UI.Design.ControlDesigner	DesignTimeHtmlRequiresLoadComplete	The recommended alternative is ControlDesigner.SetViewFlags.
System.Web.UI.Design.ControlDesigner	IsDirty	The recommended alternative is to use System.Web.UI.Design.ControlDesigner.Tag.SetDirty and System.Web.UI.Design.ControlDesigner.Tag.IsDirty.
System.Web.UI.Design.ControlDesigner	RaiseResizeEvent	Use of this method is not recommended because resizing is handled by the ControlDesigner.OnComponentChanged method.
System.Web.UI.Design.ControlDesigner	GetPersistInnerHtml	The recommended alternative is ControlDesigner.GetPersistenceContent.
System.Web.UI.Design.TemplatedControlDesigner	GetTemplateContainerDataSource	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing, expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.TemplatedControlDesigner	InTemplateMode	The recommended alternative is ControlDesigner.InTemplateMode.
System.Web.UI.Design.TemplatedControlDesigner	GetTemplateEditingVerbs	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.TemplatedControlDesigner	ActiveTemplateEditingFrame	Use of this property is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.TemplatedControlDesigner	GetTemplateContent	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.TemplatedControlDesigner	GetTemplateContainerDataItemProperty	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.TemplatedControlDesigner	EnterTemplateMode	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.TemplatedControlDesigner	ExitTemplateMode	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.TemplatedControlDesigner	SetTemplateContent	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.TemplatedControlDesigner	GetTemplatePropertyParentType	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.WebControls.BaseDataListDesigner	GetTemplateContainerDataSource	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing, expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.WebControls.DataGridDesigner	GetTemplateContainerDataItemProperty	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.WebControls.DataGridDesigner	SetTemplateContent	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.WebControls.DataGridDesigner	GetTemplatePropertyParentType	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.WebControls.DataGridDesigner	GetTemplateContent	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.WebControls.DataListDesigner	GetTemplateContent	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.WebControls.DataListDesigner	GetTemplateContainerDataItemProperty	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).
System.Web.UI.Design.WebControls.DataListDesigner	SetTemplateContent	Use of this method is not recommended because template editing is handled in System.Web.UI.Design.ControlDesigner. To support template editing expose template data in the ControlDesigner.TemplateGroups property and call ControlDesigner.SetViewFlags(ViewFlags.TemplateEditing, true).

System.dll

Type	Member	Message
System.ComponentModel.TypeDescriptor	ComNativeDescriptorHandler	This property has been deprecated. Use a type description provider to supply type information for COM types instead.
System.ComponentModel.Design.DesignerTransactionCloseEventArgs	DesignerTransactionCloseEventArgs(Boolean)	This constructor is obsolete. Use DesignerTransactionCloseEventArgs(Boolean, Boolean) instead.
System.ComponentModel.Design.SelectionTypes	MouseDown	This value has been deprecated. It is no longer supported.
System.ComponentModel.Design.SelectionTypes	Normal	This value has been deprecated. Use SelectionTypes.Auto instead.
System.ComponentModel.Design.SelectionTypes	Valid	This value has been deprecated. Use System.Enum class methods to determine valid values, or use a type converter.
System.ComponentModel.Design.SelectionTypes	MouseUp	This value has been deprecated. It is no longer supported.
System.ComponentModel.Design.SelectionTypes	Click	This value has been deprecated. Use SelectionTypes.Primary instead.
System.ComponentModel.Design.ViewTechnology	WindowsForms	This value has been deprecated. Use ViewTechnology.Default instead.
System.ComponentModel.Design.ViewTechnology	Passthrough	This value has been deprecated. Use ViewTechnology.Default instead.
System.CodeDom.Compiler.CodeDomProvider	CreateGenerator()	Callers should not use the System.CodeDom.Compiler.ICodeGenerator interface and should instead use the methods directly on the System.CodeDom.Compiler.CodeDomProvider class. Those inheriting from CodeDomProvider must still implement this interface, and should exclude this warning or also obsolete this method.
System.CodeDom.Compiler.CodeDomProvider	CreateCompiler	Callers should not use the System.CodeDom.Compiler.ICodeCompiler interface and should instead use the methods directly on the System.CodeDom.Compiler.CodeDomProvider class. Those inheriting from CodeDomProvider must still implement this interface, and should exclude this warning or also obsolete this method.
System.CodeDom.Compiler.CodeDomProvider	CreateParser	Callers should not use the System.CodeDom.Compiler.ICodeParser interface and should instead use the methods directly on the System.CodeDom.Compiler.CodeDomProvider class. Those inheriting from CodeDomProvider must still implement this interface, and should exclude this warning or also obsolete this method.
System.CodeDom.Compiler.CompilerParameters	Evidence	CAS policy is obsolete and will be removed in a future release of the .NET Framework. Please see Security Changes in the .NET Framework 4 for more information.
System.CodeDom.Compiler.CompilerResults	Evidence	CAS policy is obsolete and will be removed in a future release of the .NET Framework. Please see Security Changes in the .NET Framework 4 for more information.
System.Collections.Specialized.NameValueCollection	NameValueCollection(IHashCodeProvider, IComparer)	Please use NameValueCollection(IEqualityComparer) instead.
System.Collections.Specialized.NameValueCollection	NameValueCollection(Int32, IHashCodeProvider, IComparer)	Please use NameValueCollection(Int32, IEqualityComparer) instead.
Microsoft.Win32.SystemEvents	LowMemory	This event has been deprecated.
Microsoft.CSharp.CSharpCodeProvider	CreateGenerator	Callers should not use the System.CodeDom.Compiler.ICodeGenerator interface and should instead use the methods directly on the System.CodeDom.Compiler.CodeDomProvider class.
Microsoft.CSharp.CSharpCodeProvider	CreateCompiler	Callers should not use the System.CodeDom.Compiler.ICodeCompiler interface and should instead use the methods directly on the System.CodeDom.Compiler.CodeDomProvider class.
Microsoft.VisualBasic.VBCodeProvider	CreateGenerator	Callers should not use the System.CodeDom.Compiler.ICodeGenerator interface and should instead use the methods directly on the System.CodeDom.Compiler.CodeDomProvider class.
Microsoft.VisualBasic.VBCodeProvider	CreateCompiler	Callers should not use the System.CodeDom.Compiler.ICodeCompiler interface and should instead use the methods directly on the System.CodeDom.Compiler.CodeDomProvider class.
System.Uri	MakeRelative	The method has been deprecated. Please use Uri.MakeRelativeUri.
System.Uri	Uri(String, Boolean)	The constructor has been deprecated. Please use Uri(String). The dontEscape parameter is deprecated and is always false.
System.Uri	Uri(Uri, String, Boolean)	The constructor has been deprecated. Please Uri(Uri, String). The dontEscape parameter is deprecated and is always false.
System.Net.Dns	GetHostByAddress(String)	GetHostByAddress(String) is obsoleted for this type, please use Dns.GetHostEntry(String) instead.
System.Net.Dns	GetHostByAddress(IPAddress)	GetHostByAddress(IPAddress) is obsoleted for this type, please use Dns.GetHostEntry(IPAddress) instead.
System.Net.Dns	GetHostByName	GetHostByName is obsoleted for this type, please use Dns.GetHostEntry(String) instead.
System.Net.Dns	BeginResolve(String, AsyncCallback, Object)	BeginResolve(String, AsyncCallback, Object) is obsoleted for this type, please use Dns.BeginGetHostEntry(String, AsyncCallback, Object) instead.
System.Net.Dns	EndResolve	EndResolve is obsoleted for this type, please use Dns.EndGetHostEntry instead.
System.Net.Dns	Resolve	Resolve is obsoleted for this type, please use Dns.GetHostEntry(String) instead.
System.Net.Dns	BeginGetHostByName	BeginGetHostByName is obsoleted for this type, please use Dns.BeginGetHostEntry(String, AsyncCallback, Object) instead.
System.Net.Dns	EndGetHostByName	EndGetHostByName is obsoleted for this type, please use Dns.EndGetHostEntry instead.
System.Net.IPAddress	Address	This property has been deprecated. It is address family dependent. Please use the IPAddress.Equals method to perform comparisons.
System.Net.ServicePointManager	CertificatePolicy	CertificatePolicy is obsoleted for this type, please use ServicePointManager.ServerCertificateValidationCallback instead.
System.Net.WebProxy	GetDefaultProxy	This method has been deprecated. Please use the proxy selected for you by default.
System.Net.Sockets.Socket	SupportsIPv6	SupportsIPv6 is obsoleted for this type, please use Socket.OSSupportsIPv6 instead.
System.Net.Sockets.Socket	SupportsIPv4	SupportsIPv4 is obsoleted for this type, please use Socket.OSSupportsIPv4 instead.
System.Net.Sockets.TcpListener	TcpListener(Int32)	This method has been deprecated. Please use TcpListener(IPAddress, Int32) instead.
System.Net.Mail.MailMessage	ReplyTo	ReplyTo is obsoleted for this type. Please use MailMessage.ReplyToList instead which can accept multiple addresses.
System.Configuration.ConfigurationException	ConfigurationException(String, Exception)	This class is obsolete. to create a new exception create a System.Configuration.ConfigurationErrorsException.
System.Configuration.ConfigurationException	ConfigurationException()	This class is obsolete, to create a new exception create a System.Configuration.ConfigurationErrorsException.
System.Configuration.ConfigurationException	GetXmlNodeLineNumber	This class is obsolete, use GetLineNumber(XmlNode) instead
System.Configuration.ConfigurationException	ConfigurationException(String, String, Int32)	This class is obsolete, to create a new exception create a System.Configuration.ConfigurationErrorsException.
System.Configuration.ConfigurationException	ConfigurationException(String)	This class is obsolete, to create a new exception create a System.Configuration.ConfigurationErrorsException.
System.Configuration.ConfigurationException	ConfigurationException(String, Exception, String, Int32)	This class is obsolete, to create a new exception create a System.Configuration.ConfigurationErrorsException.
System.Configuration.ConfigurationException	ConfigurationException(String, XmlNode)	This class is obsolete, to create a new exception create a System.Configuration.ConfigurationErrorsException.
System.Configuration.ConfigurationException	ConfigurationException(String, Exception, XmlNode)	This class is obsolete, to create a new exception create a System.Configuration.ConfigurationErrorsException.
System.Configuration.ConfigurationException	GetXmlNodeFilename	This class is obsolete, use ConfigurationErrorsException.GetFilename instead.
System.Configuration.ConfigurationSettings	AppSettings	This method is obsolete. It has been replaced by ConfigurationManager.AppSettings.
System.Configuration.ConfigurationSettings	GetConfig	This method is obsolete. It has been replaced by ConfigurationManager.GetSection.
System.Diagnostics.EventLog	CreateEventSource(String, String, String)	This method has been deprecated. Please use CreateEventSource(EventSourceCreationData) instead.
System.Diagnostics.EventLogEntry	EventID	This property has been deprecated. Please use EventLogEntry.InstanceId instead.
System.Diagnostics.EventLogPermissionAccess	Audit	This member has been deprecated. Please use EventLogPermissionAccess.Administer instead.
System.Diagnostics.EventLogPermissionAccess	Browse	This member has been deprecated. Please use EventLogPermissionAccess.Administer instead.
System.Diagnostics.EventLogPermissionAccess	Instrument	This member has been deprecated. Please use EventLogPermissionAccess.Write instead.
System.Diagnostics.InstanceDataCollection	InstanceDataCollection	This constructor has been deprecated. Please use InstanceDataCollectionCollection.Item to get an instance of this collection instead.
System.Diagnostics.InstanceDataCollectionCollection	InstanceDataCollectionCollection	This constructor has been deprecated. Please use PerformanceCounterCategory.ReadCategory to get an instance of this collection instead.
System.Diagnostics.PerformanceCounter	DefaultFileMappingSize	This field has been deprecated and is not used. Use machine.config or an application configuration file to set the size of the System.Diagnostics.PerformanceCounter file mapping.
System.Diagnostics.PerformanceCounterCategory	Create(String, String, String, String)	This method has been deprecated. Please use Create(String, String, PerformanceCounterCategoryType, String, String) instead.
System.Diagnostics.PerformanceCounterCategory	Create(String, String, CounterCreationDataCollection)	This method has been deprecated. Please use Create(String, String, PerformanceCounterCategoryType, CounterCreationDataCollection) instead.
System.Diagnostics.PerformanceCounterManager	PerformanceCounterManager	This class has been deprecated. Use the performance counters through the System.Diagnostics.PerformanceCounter class instead.
System.Diagnostics.PerformanceCounterPermissionAccess	Instrument	This member has been deprecated. Use PerformanceCounterPermissionAccess.Write instead.
System.Diagnostics.PerformanceCounterPermissionAccess	Browse	This member has been deprecated. Use PerformanceCounterPermissionAccess.Read instead.
System.Diagnostics.Process	WorkingSet	This property has been deprecated. Please use Process.WorkingSet64 instead.
System.Diagnostics.Process	VirtualMemorySize	This property has been deprecated. Please use Process.VirtualMemorySize64 instead.
System.Diagnostics.Process	PeakPagedMemorySize	This property has been deprecated. Please use Process.PeakPagedMemorySize64 instead.
System.Diagnostics.Process	PrivateMemorySize	This property has been deprecated. Please use Process.PrivateMemorySize64 instead.
System.Diagnostics.Process	PagedSystemMemorySize	This property has been deprecated. Please use Process.PagedSystemMemorySize64 instead.
System.Diagnostics.Process	NonpagedSystemMemorySize	This property has been deprecated. Please use Process.NonpagedSystemMemorySize64 instead.
System.Diagnostics.Process	PeakVirtualMemorySize	This property has been deprecated. Please use Process.PeakVirtualMemorySize64 instead.
System.Diagnostics.Process	PeakWorkingSet	This property has been deprecated. Please use Process.PeakWorkingSet64 instead.
System.Diagnostics.Process	PagedMemorySize	This property has been deprecated. Please use PagedMemorySize64 instead.

System.Drawing.dll

Type	Member	Message
System.Drawing.FontFamily	GetFamilies	Do not use the GetFamilies method; use the FontFamily.Families property instead.

System.Messaging.dll

Type	Member	Message
System.Messaging.MessageQueue	GetEnumerator	This method returns a System.Messaging.MessageEnumerator that implements the MessageEnumerator.RemoveCurrent family of methods incorrectly. Please use MessageQueue.GetMessageEnumerator2 instead.
System.Messaging.MessageQueue	GetMessageEnumerator	This method returns a System.Messaging.MessageEnumerator that implements the MessageEnumerator.RemoveCurrent family of methods incorrectly. Please use MessageQueue.GetMessageEnumerator2 instead.

System.ServiceModel.dll

Type	Member	Message
System.ServiceModel.Security.WindowsClientCredential	AllowNtlm	This property is deprecated and is maintained for backward compatibility only. The local machine policy will be used to determine if NTLM should be used.

System.Web.DataVisualization.dll

Type	Member	Message
System.Web.UI.DataVisualization.Charting.Chart	ViewStateData	ViewStateData has been deprecated. Please investigate Control.ViewState instead.

System.Web.dll

Type	Member	Message
System.Web.Configuration.AuthenticationMode	Passport	This field is obsolete. The Passport authentication product is no longer supported and has been superseded by Live ID.
System.Web.Configuration.AuthenticationSection	Passport	This property is obsolete. The Passport authentication product is no longer supported and has been superseded by Live ID.
System.Web.Configuration.HttpCapabilitiesBase	JavaScript	The recommended alternative is the HttpCapabilitiesBase.EcmaScriptVersion property. A Version.Major version value greater than or equal to 1 implies JavaScript support.
System.Web.Configuration.SystemWebSectionGroup	MobileControls	System.Web.Mobile.dll is obsolete.
System.Web.HttpContext	GetAppConfig	The recommended alternative is WebConfigurationManager.GetWebApplicationSection in System.Web.dll.
System.Web.HttpContext	GetConfig	The recommended alternative is HttpContext.GetSection in System.Web.dll.
System.Web.UI.Page	RegisterOnSubmitStatement	The recommended alternative is Page.ClientScript.RegisterOnSubmitStatement(Type type, String key, String script).
System.Web.UI.Page	RegisterArrayDeclaration	The recommended alternative is Page.ClientScript.RegisterArrayDeclaration(String arrayName, String arrayValue).
System.Web.UI.Page	GetPostBackClientEvent	The recommended alternative is Page.ClientScript.GetPostBackEventReference.
System.Web.UI.Page	GetPostBackClientHyperlink	The recommended alternative is Page.ClientScript.GetPostBackClientHyperlink.
System.Web.UI.Page	IsStartupScriptRegistered	The recommended alternative is Page.ClientScript.IsStartupScriptRegistered(String key).
System.Web.UI.Page	RegisterHiddenField	The recommended alternative is Page.ClientScript.RegisterHiddenField(String hiddenFieldName, String hiddenFieldInitialValue).
System.Web.UI.Page	RegisterClientScriptBlock	The recommended alternative is PageClientScript.RegisterClientScriptBlock(Type type, String key, String script).
System.Web.UI.Page	SmartNavigation	The recommended alternative is Page.SetFocus and PageMaintainScrollPositionOnPostback().
System.Web.UI.Page	GetPostBackEventReference(Control)	The recommended alternative is Page.ClientScript.GetPostBackEventReference.
System.Web.UI.Page	RegisterStartupScript	The recommended alternative is Page.ClientScript.RegisterStartupScript(Type type, String key, String script).
System.Web.UI.Page	IsClientScriptBlockRegistered	The recommended alternative is Page.ClientScript.IsClientScriptBlockRegistered(String key).
System.Web.UI.Page	GetPostBackEventReference(Control, String)	The recommended alternative is Page.ClientScript.GetPostBackEventReference.
System.Web.UI.WebControls.Xml	Document	The recommended alternative is the Xml.XPathNavigator property. Create a System.Xml.XPath.XPathDocument and call XPathDocument.CreateNavigator to create an System.Xml.XPath.XPathNavigator.

System.Web.DynamicData.dll

Type	Member	Message
System.Web.DynamicData.DynamicDataExtensions	EnablePersistedSelection	Use the EnablePersistedSelection property on a databound control such as System.Web.UI.WebControls.GridView or System.Web.UI.WebControls.ListView.

System.Web.Extensions.dll

Type	Member	Message
System.Web.UI.ScriptReferenceBase	NotifyScriptLoaded	NotifyScriptLoaded is no longer required in script references.
System.Web.UI.ScriptManager	ScriptPath	This property is obsolete. Set the Path property on each individual System.Web.UI.ScriptReference instead.
System.Web.UI.ScriptReference	IgnoreScriptPath	This property is obsolete. Instead of using ScriptManager.ScriptPath, set the Path property on each individual System.Web.UI.ScriptReference.
System.Web.UI.ScriptResourceAttribute	TypeName	This property is obsolete. Use ScriptResourceAttribute.StringResourceClientTypeName instead.
System.Web.UI.ScriptResourceAttribute	ScriptResourceName	This property is obsolete. Use ScriptResourceAttribute.StringResourceName instead.

System.Web.Services.dll

Type	Member	Message
System.Web.Services.Protocols.SoapHeaderAttribute	Required	This property will be removed from a future version. The presence of a particular header in a SOAP message is no longer enforced.
System.Web.Services.Discovery.DiscoveryClientProtocol	LoadExternals	This method will be removed from a future version. The method call is no longer required for resource discovery.

System.Windows.Forms.dll

Type	Member	Message
System.Windows.Forms.AccessibleStates	Valid	This enumeration value has been deprecated. There is no replacement.
System.Windows.Forms.Control	Scale(Single)	This method has been deprecated. Use the Control.Scale(SizeF) method instead.
System.Windows.Forms.Control	Scale(Single, Single)	This method has been deprecated. Use the Control.Scale(SizeF) method instead.
System.Windows.Forms.Form	GetAutoScaleSize	This method has been deprecated. Use the ContainerControl.AutoScaleDimensions property instead.
System.Windows.Forms.Form	AutoScale	This property has been deprecated. Use the ContainerControl.AutoScaleMode property instead.
System.Windows.Forms.PrintPreviewDialog	AutoScaleBaseSize	This property has been deprecated. Use the ContainerControl.AutoScaleDimensions property instead.

System.Xaml.dll

Type	Member	Message
System.Windows.Markup.MarkupExtensionReturnTypeAttribute	MarkupExtensionReturnTypeAttribute(Type, Type)	The expressionType argument is not used by the XAML parser. To specify the expected return type, use MarkupExtensionReturnTypeAttribute.MarkupExtensionReturnTypeAttribute(Type). To specify custom handling for expression types, use System.Windows.Markup.XamlSetMarkupExtensionAttribute.
System.Windows.Markup.MarkupExtensionReturnTypeAttribute	ExpressionType	This is not used by the XAML parser. Please look at System.Windows.Markup.XamlSetMarkupExtensionAttribute.

System.Xml.dll

Type	Member	Message
System.Xml.XmlConvert	ToDateTime(String)	Use XmlConvert.ToDateTime(String, XmlDateTimeSerializationMode).
System.Xml.XmlConvert	ToString(DateTime)	Use XmlConvert.ToString(DateTime, XmlDateTimeSerializationMode).
System.Xml.ValidationType	Auto	Validation type should be specified as ValidationType.DTD or ValidationType.Schema.
System.Xml.ValidationType	ValidationType.XDR	XDR Validation through System.Xml.XmlValidatingReader is obsoleted.
System.Xml.XmlReaderSettings	ProhibitDtd	Use the XmlReaderSettings.DtdProcessing property instead.
System.Xml.XmlTextReader	ProhibitDtd	Use the XmlTextReader.DtdProcessing property instead.
System.Xml.Schema.XmlSchema	Compile(ValidationEventHandler)	Use XmlSchemaSet for schema compilation and validation.
System.Xml.Schema.XmlSchema	Compile(ValidationEventHandler, XmlResolver)	Use XmlSchemaSet for schema compilation and validation.
System.Xml.Schema.XmlSchemaAttribute	AttributeType	This property has been deprecated. Please use XmlSchemaAttribute.AttributeSchemaType property, which returns a strongly typed attribute type.
System.Xml.Schema.XmlSchemaType	BaseSchemaType	This property has been deprecated. Please use the XmlSchemaType.BaseXmlSchemaType property, which returns a strongly typed base schema type.
System.Xml.Schema.XmlSchemaElement	ElementType	This property has been deprecated. Please use the XmlSchemaElement.ElementSchemaType property, which returns a strongly typed element type.
System.Xml.Serialization.CodeIdentifier	CodeIdentifier	This class should never get constructed as it contains only static methods.
System.Xml.Serialization.XmlSerializer	FromMappings(XmlMapping[], Evidence)	This method is obsolete and will be removed in a future release of the .NET Framework. Please use an overload of XmlSerializer.FromMappings that does not take an System.Security.Policy.Evidence parameter.
System.Xml.Serialization.XmlSerializer	XmlSerializer(Type, XmlAttributeOverrides, Type[], XmlRootAttribute, String, String, Evidence)	This method is obsolete and will be removed in a future release of the .NET Framework. Please use an XmlSerializer.XmlSerializer constructor overload that does not take an System.Security.Policy.Evidence parameter.
System.Xml.Serialization.XmlSerializerFactory	CreateSerializer(Type, XmlAttributeOverrides, Type[], XmlRootAttribute, String, String, Evidence)	This method is obsolete and will be removed in a future release of the .NET Framework. Please use an overload of XmlSerializerFactory.CreateSerializer that does not take an System.Security.Policy.Evidence parameter.

Obsolete Members in Microsoft Assemblies

The following tables list the obsolete members in Microsoft assemblies. These assemblies are special-purpose assemblies such as assemblies that target an individual language (such as Microsoft.VisualBasic.dll) or a build system (such as Microsoft.Build.Engine.dll).

IEHost.dll and IEExec.exe

The IEHost.dll and IEExec.exe assemblies have been removed from the .NET Framework. All of their types and their members are obsolete and are not supported as of .NET Framework 4. These assemblies were used to host Windows Forms controls and to run executables in Internet Explorer. Alternatives to this technology include ClickOnce, XAML Browser Applications (XBAP), and Microsoft Silverlight.

ISymWrapper.dll

Type	Member	Message
System.Diagnostics.SymbolStore.SymBinder	GetReader(Int32, String, String)	The recommended alternative is SymBinder.GetReader(IntPtr, String, String). ISymbolBinder1.GetReader takes the importer interface pointer as an System.IntPtr instead of an System.Int32, and thus works on both 32-bit and 64-bit architectures.

Microsoft.Build.Conversion.v4.0.dll

Type	Member	Message
Microsoft.Build.Conversion.ProjectFileConverter	ConvertInMemory(Engine, ProjectLoadSettings)	Use parameterless ProjectFileConverter.ConvertInMemory() method instead.
Microsoft.Build.Conversion.ProjectFileConverter	ConvertInMemory(Engine)	Use parameterless ProjectFileConverter.ConvertInMemory() method instead.
Microsoft.Build.Conversion.ProjectFileConverter	Convert(String)	Use parameterless Convert() overload instead.
Microsoft.Build.Conversion.ProjectFileConverter	Convert(ProjectLoadSettings)	Use parameterless Convert() overload instead.

Microsoft.Build.Engine.dll

Type	Member	Message
Microsoft.Build.BuildEngine.Engine	Engine(String)	If you were simply passing in the .NET Framework location as the BinPath, just change to the parameterless Engine() constructor. Otherwise, you can define custom toolsets in the registry or config file, or by adding elements to the Engine's Microsoft.Build.BuildEngine.ToolsetCollection. Then use either the Engine() or Engine(ToolsetLocations) constructor instead.
Microsoft.Build.BuildEngine.Engine	BinPath	Avoid setting BinPath. If you were simply passing in the .NET Framework location as the BinPath, no other action is necessary. Otherwise, define Toolsets instead in the registry or config file, or by adding elements to the Engine's Microsoft.Build.BuildEngine.ToolsetCollection, in order to use a custom BinPath.

Microsoft.VisualBasic.dll

Type	Member	Message
Microsoft.VisualBasic.FileSystem	FilePut(Object, Object, Object)	This member has been deprecated. Please use FileSystem.FilePutObject to write Object types, or coerce FileNumber and RecordNumber to Int32 for writing non-object types.
Microsoft.VisualBasic.CompilerServices.Conversions	FallbackUserDefinedConversion	Do not use this method.
Microsoft.VisualBasic.CompilerServices.NewLateBinding	FallbackSetComplex	Do not use this method.
Microsoft.VisualBasic.CompilerServices.NewLateBinding	FallbackInvokeDefault1	Do not use this method.
Microsoft.VisualBasic.CompilerServices.NewLateBinding	FallbackGet	Do not use this method.
Microsoft.VisualBasic.CompilerServices.NewLateBinding	FallbackInvokeDefault2	Do not use this method.
Microsoft.VisualBasic.CompilerServices.NewLateBinding	FallbackIndexSet	Do not use this method.
Microsoft.VisualBasic.CompilerServices.NewLateBinding	FallbackSet	Do not use this method.
Microsoft.VisualBasic.CompilerServices.NewLateBinding	FallbackIndexSetComplex	Do not use this method.
Microsoft.VisualBasic.CompilerServices.NewLateBinding	FallbackCall	Do not use this method.
Microsoft.VisualBasic.CompilerServices.Operators	FallbackInvokeUserDefinedOperator	Do not use this method.
Microsoft.VisualBasic.MyServices.RegistryProxy	DynData	The DynData registry key works only on Win9x, which is not supported by this version of the .NET Framework. Use the PerformanceData registry key instead. This property will be removed from a future version of the Framework.