Parameter names changed in reference assemblies

Some reference assembly parameter names have changed to match parameter names in the implementation assemblies.

Change description

In previous .NET versions, some reference assembly parameter names are different to their corresponding parameters in the implementation assembly. This can cause problems while using named arguments and reflection.

In .NET 5, these mismatched parameter names were updated in the reference assemblies to exactly match the corresponding parameter names in the implementation assemblies.

The following table shows the APIs and parameter names that changed.

API	Old parameter name	New parameter name
CodeGenerator.GenerateStatements(CodeStatementCollection)	stms	stmts
Icon.ISerializable.GetObjectData(SerializationInfo, StreamingContext)	info	si
Image.ISerializable.GetObjectData(SerializationInfo, StreamingContext)	info	si
IPAddress.Parse(ReadOnlySpan<Char>)	ipString	ipSpan
IPAddress.TryParse(ReadOnlySpan<Char>, IPAddress)	ipString	ipSpan
IsolatedStorageFileStream.BeginRead(Byte[], Int32, Int32, AsyncCallback, Object)	buffer	array
IsolatedStorageFileStream.BeginWrite(Byte[], Int32, Int32, AsyncCallback, Object)	buffer	array
NetworkCredential.GetCredential(String, Int32, String)	authType	authenticationType
ParenthesizePropertyNameAttribute.Equals(Object)	o	obj
RefreshPropertiesAttribute.Equals(Object)	value	obj
StackFrame(Boolean)	fNeedFileInfo	needFileInfo
StackFrame(Int32, Boolean)	fNeedFileInfo	needFileInfo
StringNormalizationExtensions.IsNormalized(String, NormalizationForm)	value	strInput
StringNormalizationExtensions.IsNormalized(String)	value	strInput
StringNormalizationExtensions.Normalize(String, NormalizationForm)	value	strInput
StringNormalizationExtensions.Normalize(String)	value	strInput

Reason for change

The parameter names were changed for consistency and to avoid failures when using named arguments and reflection.

Version introduced

5.0

Recommended action

If you encounter a compiler error due to a parameter name change, update the parameter name accordingly.

Affected APIs

• System.CodeDom.Compiler.CodeGenerator.GenerateStatements(CodeStatementCollection)
• System.ComponentModel.ParenthesizePropertyNameAttribute.Equals(Object)
• System.ComponentModel.RefreshPropertiesAttribute.Equals(Object)
• StackFrame(Boolean)
• StackFrame(Int32, Boolean)
• System.Drawing.Icon.System.Runtime.Serialization.ISerializable.GetObjectData(SerializationInfo, StreamingContext)
• System.Drawing.Image.System.Runtime.Serialization.ISerializable.GetObjectData(SerializationInfo, StreamingContext)
• System.IO.IsolatedStorage.IsolatedStorageFileStream.BeginRead(Byte[], Int32, Int32, AsyncCallback, Object)
• System.IO.IsolatedStorage.IsolatedStorageFileStream.BeginWrite(Byte[], Int32, Int32, AsyncCallback, Object)
• System.Net.IPAddress.Parse(ReadOnlySpan<Char>)
• System.Net.IPAddress.TryParse(ReadOnlySpan<Char>, IPAddress)
• System.Net.NetworkCredential.GetCredential(String, Int32, String)
• System.StringNormalizationExtensions.IsNormalized(String, NormalizationForm)
• System.StringNormalizationExtensions.IsNormalized(String)
• System.StringNormalizationExtensions.Normalize(String, NormalizationForm)
• System.StringNormalizationExtensions.Normalize(String)