See title. Reflection.Emit seems to be more about creating a new dynamic assembly, not for loading an exisitng assembly and inspecting its IL.
Reflector does this, and last time I checked, Reflector could still inspect (i.e. disassemble) itself this way, so it will show you exactly how it works.
来源：https://stackoverflow.com/questions/2824086/is-it-possible-to-inspect-an-assemblys-il-instructions-programmatically-using-m