dnSpy is a premier open-source tool for developers and security researchers who need to decompile, debug, and edit .NET and Unity assemblies. It is particularly valued in reverse engineering because it allows users to modify code even when the original source code is missing.
The original dnSpy project was archived in December 2020, though its final stable release (v6.1.8) is still widely available. For the most modern features and compatibility, many users have migrated to , an unofficial community-maintained revival. Releases · dnSpy/dnSpy - GitHub dnspy pc download