How to determine if DLL is COM or .NET?

Question

I have an updater program, the pulled files from server has mixed vb6 dll and .net DLLs in one directory.

How to determine if a dll is a COM one? (so i can invoke regsvr32 to it from the updater program)

Answer 1

I guess one way to do it would be to try load the file with System.Reflection.Assembly.LoadFile() (more info). If you get a BadImageFormatException, it's not a valid .NET assembly. There's probably a neater way of doing this, but this should work.