Some older community-made plugins for deobfuscation were built specifically for the v5.x architecture.
dnSpy is an open-source tool designed to reverse engineer .NET assemblies. Unlike a standard text editor, it allows users to open a compiled .dll or .exe file and view the original C# source code—even if the source code wasn't provided. Key Capabilities: dnspy 5.0.5 download
It turns compiled code back into human-readable C#. dnspy 5.0.5 download
If you are downloading it to analyze suspicious files, always run dnSpy within a Virtual Machine (VM) to protect your host OS. System Requirements To run dnSpy 5.0.5, your machine generally needs: OS: Windows 7 or higher. dnspy 5.0.5 download
You can attach dnSpy to a running process to set breakpoints and inspect variables in real-time.