What is ILSpy?
ILSpy is the open-source .NET assembly browser and decompiler.
Comments and Reviews
Said about ILSpy as an alternative
ILSpy is for C# and .NET, while Snowman is C++
Also allows decompilation of .NET assemblies but DnSpy adds the debugging and editing features. Both use the same IL spy source code for the .NET decompiler.