Manually edit MSIL in compiled DLL

If you want to make a small chang开发者_StackOverflow中文版e to a .net application, is it possible to edit the MSIL directly?

Use ildasm.exe to decompile and recompile with ilasm.exe. For strong-named assemblies you will need the key file if you want that the recompiled assembly has the same identity as the original assembly.