ILSpy

ILSpy: Handy app to help decompile .NET assemblies to see what makes the software tick.

ILSpy is a very handy application that was developed in order to help analyze software products that were designed with .NET Framework, to closely inspect every component, in order to figure out what was used in the original assembly.

The program is very easy to use, lets not forget it's free and open-source, which won't require any installation and can be copied and pasted on a USB drive in order to move it around anywhere without modifying any of the Windows registries.

It comes with the main window that has a clear-cut layout and is split into two main panes: one for exploring the tree of .NET assemblies and for getting a closer look at any selected item, and will also make it possible to inspect DLL, EXE, and WINMD files.

It is also able to render code in C#, IL, with C#, while being able to choose for C# 1.0 / VS .NET to C# 7.2 / VS 2017.

ILSpy is a great application for making it easier to decompile .NET assemblies in order to see what makes the software work, and since it's open-source, anyone can modify and use the code as they wish.