Find Duplicate Code in C# with Deslop
Duplicate code looks harmless until you fix a bug in one copy and miss the other three. C# makes extracting shared code easy. Visual Studio can extract a method, Roslyn can enforce hundreds of rules, and mature tools can measure duplication across a repository. The hard part is finding the copies early enough. This is the problem I built Deslop to solve. Deslop is a live duplicate-code analysis server with a C# parser, a VS Code extension, an LSP for editor feedback, an MCP server for AI coding agents, and a CLI for CI. It doesn’t just wait for a pull request. It updates after you save and lets an agent call find-similar before it writes another version of something that already exists. If you’re looking for a C# code duplication tool, the short answer is to install Deslop for...
Christian Findlay
Jul 30, 2026