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System.ComponentModel.Composition Namespace

.NET Framework 4.5

This namespace provides classes that constitute the core of the Managed Extensibility Framework, or MEF.

	Class	Description
	AttributedModelServices	Contains helper methods for using the MEF attributed programming model with composition.
	CatalogReflectionContextAttribute	When applied to a Assembly object, enables an AssemblyCatalog object to discover custom ReflectionContext objects.
	ChangeRejectedException	An exception that indicates whether a part has been rejected during composition.
	CompositionContractMismatchException	The exception that is thrown when the underlying exported value or metadata of a Lazy<T> or Lazy<T, TMetadata> object cannot be cast to T or TMetadataView, respectively.
	CompositionError	Represents an error that occurred during composition.
	CompositionException	Represents the exception that is thrown when one or more errors occur during composition in a CompositionContainer object.
	ExportAttribute	Specifies that a type, property, field, or method provides a particular export.
	ExportFactory<T>	A factory that creates new instances of a part that provides the specified export.
	ExportFactory<T, TMetadata>	A factory that creates new instances of a part that provides the specified export, with attached metadata.
	ExportLifetimeContext<T>	Holds an exported value created by an ExportFactory<T> object and a reference to a method to release that object.
	ExportMetadataAttribute	Specifies metadata for a type, property, field, or method marked with the ExportAttribute.
	ImportAttribute	Specifies that a property, field, or parameter value should be provided by the CompositionContainer.object
	ImportCardinalityMismatchException	The exception that is thrown when the cardinality of an import is not compatible with the cardinality of the matching exports.
	ImportingConstructorAttribute	Specifies which constructor should be used when creating a part.
	ImportManyAttribute	Specifies that a property, field, or parameter should be populated with all matching exports by the CompositionContainer object.
	InheritedExportAttribute	Specifies that a type provides a particular export, and that subclasses of that type will also provide that export.
	MetadataAttributeAttribute	Specifies that a custom attribute’s properties provide metadata for exports applied to the same type, property, field, or method.
	MetadataViewImplementationAttribute	Specifies the type used to implement a metadata view.
	PartCreationPolicyAttribute	Specifies the CreationPolicy for a part.
	PartMetadataAttribute	Specifies metadata for a part.
	PartNotDiscoverableAttribute	Specifies that this type’s exports won’t be included in a ComposablePartCatalog.

Interfaces

	Interface	Description
	ICompositionService	Provides methods to satisfy imports on an existing part instance.
	IPartImportsSatisfiedNotification	Notifies a part when its imports have been satisfied.

Enumerations

	Enumeration	Description
	CreationPolicy	Specifies when and how a part will be instantiated.
	ImportSource	Specifies values that indicate how the MEF composition engine searches for imports.

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