In the .NET IDE, I compile my .cs so I can get the debug info. But i am also partial to using csc... Mostly because I don't know what the $@&%! is going on in the IDE half the time. Anyway...

1. Compile the .cs into a .dll
2. At the command line, "sn.exe -k dllname.snk" to create a .NET strong name for the Global Assembly Cache
3. In the IDE Put the name of the created keyfile into the assemblyinfo.cs file
4. At the commmand line, "gacutil.exe /i bin\Debug\dllname.dll"

At that point, I can instance the dll from a .vbs. I am drawing a blank at the moment, but I think I could then do it from VFP too.