Getting Started With ICSharpCode.Decompiler

1. Create a new project and add the ICSharpCode.Decompiler nuget to your project.
2. Add the following usings to your code:

using ICSharpCode.Decompiler;
using ICSharpCode.Decompiler.CSharp;
using ICSharpCode.Decompiler.TypeSystem;

3. Now you can open an assembly file for decompilation with default settings:

var decompiler = new CSharpDecompiler(fileName, new DecompilerSettings());

4. You can either decompile a type or member to a SyntaxTree (for further processing) by using the Decompile*overloads or to a string using the Decompile*AsString overloads.

• If you want to decompile a specific type by name, you can use DecompileType*(FullTypeName):

The FullTypeName(string) supports reflection syntax.

var decompiler = new CSharpDecompiler("Demo.ConsoleApp.exe", new DecompilerSettings());
var name = new FullTypeName("Demo.ConsoleApp.Test+NestedClassTest");
Console.WriteLine(decompiler.DecompileTypeAsString(name));

• If you want to decompile one single member:

var decompiler = new CSharpDecompiler("Demo.ConsoleApp.exe", new DecompilerSettings());
var name = new FullTypeName("Demo.ConsoleApp.Test+NestedClassTest");
ITypeDefinition typeInfo = decompiler.TypeSystem.Compilation.FindType(name).GetDefinition();
IMemberDefinition cecilProperty = decompiler.TypeSystem.GetCecil(typeInfo.Properties.First()).Resolve();
Console.WriteLine(decompiler.DecompileAsString(cecilProperty));

• If you need the Cecil ModuleDefinition

var decompiler = new CSharpDecompiler("Demo.ConsoleApp.exe", new DecompilerSettings());
var name = new FullTypeName("Demo.ConsoleApp.Test+NestedClassTest");
ITypeDefinition type = decompiler.TypeSystem.Compilation.FindType(name).GetDefinition();
var module = decompiler.TypeSystem.GetCecil(type).Module