wine users - Jun 2010 - A problem about portting one asp.net project to mono under

there is a DLL in bin directory of asp project. this DLL was written by VC6.0. I
don't have source code of this DLL. The mono report a error  "can't
not find meta data in the DLL", I think that this DLL is not written by C#,
so mono can't load it, I want to use wine, but I don't know how to do
it, can anyone help me? Thansk!