Windows.Foundation.Metadata Namespace

Defines the attributes that indicate fundamental properties of Windows Runtime types and members.

Classes

ActivatableAttribute	Indicates that the class is an activatable runtime class.
AllowForWebAttribute	Enables developers to expose a native Windows Runtime object as a global parameter in the context of the top-level document inside of a WebView. For a Windows Runtime object to be projected, it must implement IAgileObject and be decorated with the AllowForWebAttribute attribute.
AllowMultipleAttribute	Indicates that multiple instances of a custom attribute can be applied to a target.
ApiContractAttribute	Specifies that the type represents an API contract.
ApiInformation	Enables you to detect whether a specified member, type, or API contract is present so that you can safely make API calls across a variety of devices.
AttributeNameAttribute	Indicates the name of the attribute
AttributeUsageAttribute	Specifies the use of another attribute. .NET This type appears as System.AttributeUsageAttribute.
ComposableAttribute	Indicates how a programming element is composed.
ContractVersionAttribute	Indicates the version of the API contract.
CreateFromStringAttribute	Creates a metadata object from a string.
DefaultAttribute	Indicates the default interface for a runtime class.
DefaultOverloadAttribute	Indicates that a method is the default overload method. This attribute must be used with OverloadAttribute.
DeprecatedAttribute	Indicates that a type or member should be marked in metadata as deprecated. Compilers and other developer tools can read this attribute and provide info to the user about the deprecation type and possible alternates.
DualApiPartitionAttribute	Indicates that the type is supported in desktop apps and in UWP apps.
ExclusiveToAttribute	Indicates that the specified type is exclusive to this type.
ExperimentalAttribute	Indicates that a type or member should be marked in metadata as experimental, and consequently may not be present in the final, released version of an SDK or library.
FastAbiAttribute	Indicates if the type supports fast ABI.
FeatureAttribute	Expresses the state of the Windows Runtime feature associated with a Windows Runtime Type.
GCPressureAttribute	Microsoft internal use only.
GuidAttribute	Indicates the GUID for the interface or delegate.
HasVariantAttribute	Indicates that the type is an instance of a variant IInspectable. Applies to runtime classes, interfaces, and parameterized interfaces.
InternalAttribute	Indicates that a type or member should be marked in metadata as internal to the SDK or framework, and for consumption by system components only.
LengthIsAttribute	Indicates the number of array elements.
MarshalingBehaviorAttribute	Indicates the marshaling behavior of a Windows Runtime component.
MetadataMarshalAttribute	Indicates that tools should create an entry for an interface when creating an application package.
MuseAttribute	Indicates that a runtime class is compatible with UWP apps that are web browsers.
NoExceptionAttribute	Indicates if the type raises exceptions.
OverloadAttribute	Identifies the method as an overload in a language that supports overloading.
OverridableAttribute	Indicates that the interface contains overridable methods.
PlatformAttribute	Declares the platform that a type should be supported in, when platform-specific metadata is produced.
PreviousContractVersionAttribute	Indicates that the type was previously associated with a different API contract.
ProtectedAttribute	Indicates that the interface contains protected methods.
RangeAttribute	Indicates the numeric range constraints for the value of a data field.
RemoteAsyncAttribute	Indicates that an interface can be delivered using an asynchronous form of the Async pattern.
StaticAttribute	Indicates an interface that contains only static methods.
ThreadingAttribute	Indicates the threading model of a Windows Runtime class.
VariantAttribute	Indicates that the item is an instance of a variant IInspectable. Applies to method parameters, properties, and return values of types.
VersionAttribute	Indicates the version of the type.
WebHostHiddenAttribute	Identifies the type as one whose functionality is not projected into the specified target language.

Enums

AttributeTargets	Specifies the programming construct to which an attribute applies. .NET This type appears as System.AttributeTargets.
CompositionType	Specifies the visibility of a programming element for which the composable attribute is applied.
DeprecationType	Indicates a deprecation as Deprecate or Remove.
FeatureStage	Values that indicate if a Windows feature is enabled or disabled.
GCPressureAmount	Microsoft internal use only.
MarshalingType	Specifies the marshaling type for the class.
Platform	Specifies the platforms that a specified type should be supported in, as used by Windows Runtime attributes and metadata.
ThreadingModel	Specifies the threading model.

See also

• Windows.Foundation
• Windows.Foundation.Collections
• Windows.Foundation.Diagnostics
• Version adaptive code sample