DotnetTypeHider

DotnetTypeHider is an experimental .NET IL rewriting tool that makes decompiled output harder to understand by disguising user-defined types as compiler-generated anonymous types.

It works by:

• Renaming eligible classes to anonymous-type–like names
• Adding the CompilerGeneratedAttribute to those types
• Optionally hiding certain method calls by proxying them through compiler-generated anonymous type constructors

The result is code that remains fully valid and verifiable, but is significantly more confusing when viewed in common .NET decompilers.

This project is inspired by Washi1337/AwaitFuscator.

Requirements

• .NET SDK 10.0 or newer

Build

dotnet restore
dotnet build

Usage

dotnet run --project src/DotnetTypeHider -- path\to\input.dll

The rewritten assembly is written to out.dll in the current working directory.

Formatting

This repository uses CSharpier as a pinned local .NET tool:

dotnet tool restore
dotnet csharpier format .

Example

Input

Output