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UnknownWrapper Class

Wraps objects the marshaler should marshal as a VT_UNKNOWN.

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

public sealed class UnknownWrapper

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


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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0