Get types used inside a C# method body

Question

Is there a way to get all types used inside C# method?

For example,

public int foo(string str)
{
    Bar bar = new Bar();
    string x = "test";
    TEST t = bar.GetTEST();
}

would return: Bar, string and TEST.

All I can get now is the method body text using EnvDTE.CodeFunction. Maybe there is a better way to achieve it than trying to parse this code.

Answer 1

As others have mentioned, if you had the DLL you could use something similar to what ILSpy does in its Analyze feature (iterating over all the IL instructions in the assembly to find references to a specific type).

Otherwise, there is no way to do it without parsing the text into a C# Abstract Syntax Tree, AND employing a Resolver - something that can understand the semantics of the code well enough to know if "Bar" in your example is indeed a name of a type that is accessible from that method (in its "using" scope), or perhaps the name of a method, member field, etc... SharpDevelop contains a C# parser (called "NRefactory") and also contains such a Resolver, you can look into pursuing that option by looking at this thread, but beware that it is a fair amount of work to set it up to work right.