How to tell if .NET compiled code uses p/invoke?

Question

What is the easiest way to tell if .NET compiled code is using p/invoke?

Answer 1

Try using Reflector if the code isn't obfuscated to view what's going on in the .dll.

Answer 2

Use reflection and look for any methods with the [DllImport] attribute.

Answer 3

I am quite sure the Mono migration analyzer (MoMA) can do this.