How can I programatically (using reflection?) change a method body and save my changes back to disk

Question

I can get at the method body easily enough using reflection

Type type = assembly.GetType("Lorem.Ipsum.Dolor.Sit");
MethodInfo methodInfo = type.GetMethod("Amet");
MethodBody methodBody = methodInfo.GetMethodBody();

How can I programatically change the method body and save my changes back to disk?

Answer 1

AFAIK, you can't.

With reflection you modified an in-memory object which was produced from a binary loaded and optimized by the CLR at runtime.

EDIT

This question has some more information on this.

http://stackoverflow.com/questions/123540/modifying-existing-net-assemblies

Answer 2

you can't do it without third-party libs. take a look at: http://www.mono-project.com/Cecil