Compiler Error C3451
A C++ attribute cannot be applied to a CLR type. See C++ Attributes Reference for more information.
For more information, see User-Defined Attributes.
This error can be generated as a result of compiler conformance work that was done for Visual C++ 2005: the uuid (C++ Attributes) attribute is no longer allowed on a user-defined attribute using CLR programming. Use GuidAttribute instead.
See Breaking Changes in the Visual C++ 2005 Compiler for more information.