An Introduction To .NET Decompiler

  • .NET decompiler is used to decompile the Libraries, Executables, and more.
dotPeek Tool
  • dotPeek tool is a .NET decompiler. This dotPeek application can decompile different kinds of assembly files, such as -

    1. Libraries (.dll)
    2. Executable files (.exe)
    3. Windows 8 metadata files (.winmd)
    4. Archives (.zip)
    5. NuGet packages (.nupkg)
    6. Microsoft Visual Studio Extensions packages (.vsix)

      dotPeek tool

  • Some exe files produced, like chrome.exe  are not decompiled with the dotPeek tool though.
  • The dotPeek tool is introduced by Microsoft.
Features of .NET Decompiler
Decompiles libraries, executables and more.
.NET Decompiler
View source code if available
  • If the dll is supported to decompile, the code is downloaded and we can see the dll code. 
dotPeek Tool
Show or hide compiler-generated code
  • Sometimes, we want to show or hide the compiler-generated code; then, we use this .NET Decompiler.
  • We can hide our code like in the below image. 
Explore running processes 
  •  We can explore the running processes.
 Add Assembly to Assembly Explorer
View IL code in a separate view
  •  We can view intermediate language code (IL code)
IL Viewer
We can View IL code as comments to decompile C#
View IL code
 We can use our preferred color theme
  •  Different 
JetBrains dotPeek
Manage assembly lists
  • We can also view assembly list.
  • Example: We have decompiled the system.Threading.dll. This .dll file has some references which we can view with the help of dotPeek.
 Assembly Explorer
We can explore assemblies
  •  We can simply explore our .dll  -- these .dll have multiple class and base types.
 explore assemblies
We can view dependencies between assemblies
view dependencies between assemblies
Steps for Decompiling the dll
Step 1

Open the dotPeek application.
Step 2

Browse the file assemblies.
 Browse file assemblies
Step 3

View the source code.
View source code