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MSDN Library

UnknownWrapper Class

Note: This API is now obsolete.

Wraps objects the marshaler should marshal as a VT_UNKNOWN.

System.Object
  System.Runtime.InteropServices.UnknownWrapper

Namespace:  System.Runtime.InteropServices
Assemblies:   System.Runtime.InteropServices (in System.Runtime.InteropServices.dll)
  mscorlib (in mscorlib.dll)

[ObsoleteAttribute("UnknownWrapper and support for marshalling to the VARIANT type may be unavailable in future releases.")]
public sealed class UnknownWrapper

The UnknownWrapper type exposes the following members.

  NameDescription
Public methodSupported by Portable Class LibraryUnknownWrapperInitializes a new instance of the UnknownWrapper class with the object to be wrapped.
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  NameDescription
Public propertySupported by Portable Class LibraryWrappedObjectGets the object contained by this wrapper.
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  NameDescription
Public methodSupported by Portable Class LibraryEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodSupported by Portable Class LibraryGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodSupported by Portable Class LibraryGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodSupported by Portable Class LibraryToStringReturns a string that represents the current object. (Inherited from Object.)
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Only applies when the managed signature of a method takes an object.

 int MyMethod(Object o); //Managed signature
     HRESULT MyMethod(VARIANT o); //COM signature
     MyObject o = new MyObject();
     MyMethod(o); //o gets passed as VARIANT VT_DISPATCH
     MyMethod(new UnknownWrapper(o)); //o gets passed as VARIANT VT_UNKNOWN

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
Obsolete (compiler warning) in 4.6

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Obsolete (compiler warning) in Windows Phone 8.1

Portable Class Library

Supported in: Portable Class Library

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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