C# to C++/CLI to C DLL System.IO.FileNotFoundException

Question

I\'m getting System.IO.FileNotFoundException: The specified module could not be found when running C# code that calls a C++/CLI assembly which in turn

Answer 1

Are the C and C++ DLLs in the same directory as the C# assembly that's executing?

You may have to change your project output settings so that the C# assembly and the other DLLs all end up in the same folder.

I've often used the Dependency Walker in cases like this; it's a sanity check that shows that all the dependencies can actually be found.

Once your app is running, you may also want to try out Process Monitor on the code you are running, to see which DLLs are being referenced, and where they are located.