Tutorial

Well it is called decompiling the .NET application. There are certain tools which can decompile it. You just give the input of the .EXE which is created using .NET and decompiler will give you source code which is written in any .NET language e.g. C++ or C#. So it is considered as a security risk. This also raises a point that we should secure our .NET exe before giving to any one for review or testing.