Can`t register interface with regasm
See the question and my original answer on StackOverflowRemove ComImport attribute and add ComVisible attribute:
[ComVisible(true)]
[System.Security.SuppressUnmanagedCodeSecurity]
[Guid("647ED2ED-78DB-4168-B50E-DD4C506EAF53")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface ImageSourceFilter
{
void SetColor();
}