Reflector and JustDecompile are great tools for doing an in-depth examination of various types of assemblies and also for disassembling IL code towards a supported .NET language. However, they are unable to modify either the structure or the IL code of assemblies. Reflexil allows such modifications by using the powerful Mono.Cecil library written by Jb EVAIN. Reflexil runs as a plug-in and is directed especially towards IL code handling. It accomplishes this by proposing a complete instruction editor and by allowing C#/VB.NET code injection, as we will see in the following two examples.