The .NET Assembly Editor
Reflexil is an assembly editor and runs as a plug-in for Red Gate's Reflector, ILSpy and Telerik's JustDecompile. Reflexil is using Mono.Cecil, written by Jb Evain and is able to manipulate IL code and save the modified assemblies to disk. Reflexil also supports C#/VB.NET code injection.
Homepage:
http://reflexil.net
HowTo:
http://www.codeproject.com/KB/msil/reflexil.aspx
Github:
https://github.com/sailro/Reflexil
And, here's the latest 2.0 DLL

1.9 was the latest version for a whille, this is nightly as of July 23rd or smth.
Downloads:
Code:
Future artifacts (nightly ci builds) https://ci.appveyor.com/project/sailro/reflexil/build/artifacts
https://mega.nz/#!6w4myK7Z!8dD__jKotQ0zhz16C5Tpise6U7CUUTxs5FN7Vt73Ug4