C# Definition:

    [ComVisible(false)]
    [ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid(Consts.sIID_IUnknown)]
    public interface IUnknown
    {
    IntPtr QueryInterface(ref Guid riid);

    [PreserveSig]
    UInt32 AddRef();

    [PreserveSig]
    UInt32 Release();
    }

User-Defined Types:

None.

Notes:

None.