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Type::IsEquivalentTo Method

Determines whether two COM types have the same identity and are eligible for type equivalence.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public:
virtual bool IsEquivalentTo(
	Type^ other
)

Parameters

other
Type: System::Type
The COM type that is tested for equivalence with the current type.

Return Value

Type: System::Boolean
true if the COM types are equivalent; otherwise, false. This method also returns false if one type is in an assembly that is loaded for execution, and the other is in an assembly that is loaded into the reflection-only context.

Beginning with the .NET Framework version 4, the common language runtime supports the embedding of type information for COM types directly into managed assemblies, instead of requiring the managed assemblies to obtain type information for COM types from interop assemblies. Because the embedded type information includes only the types and members that are actually used by a managed assembly, two managed assemblies might have very different views of the same COM type. Each managed assembly has a different Type object to represent its view of the COM type. The common language runtime supports type equivalence between these different views for interfaces, structures, enumerations, and delegates.

Type equivalence means that a COM object that is passed from one managed assembly to another can be cast to the appropriate managed type in the receiving assembly. The IsEquivalentTo method enables an assembly to determine that a COM object obtained from another assembly has the same COM identity as one of the first assembly's own embedded interop types, and thus can be cast to that type.

For more information, see Type Equivalence and Embedded Interop Types.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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