How to know which exact .NET assembly is used

I need to know exactly which FSharp.Compiler.dll file the Fsc.exe is using. I have reasons to believe that it is not using the file adjac开发者_开发技巧ent to it, so I want to know which one it does use. The version numbers are the same, but the locations are different.

Any ideas how to find out?

Could always load up Process Explorer and see which DLLs are loaded.

If you already have a reference to the compiler object, you should do the following : compiler.GetType().Assembly.Location()