Microsoft Code Coverage

What Microsoft Code Coverage is

Microsoft Code Coverage measures how much of a project’s code is exercised by tests, including unit tests. It supports managed CLR code and unmanaged native code, with static and dynamic instrumentation. The documented workflows collect coverage for .NET tests with `dotnet test` and for other .NET applications with the `dotnet-coverage` tool. When used with Microsoft.Testing.Platform.MSBuild, coverage extensions are auto-registered alongside MSTest, NUnit, and xUnit runners. The MTP extension can output coverage, XML, and Cobertura reports. Settings in runsettings or dedicated coverage files can control output, inclusion and exclusion rules, and instrumentation. Supported operating systems include Windows, macOS, and multiple Linux distributions, though instrumentation support varies by OS, version, and architecture. Other systems are supported on a best-effort basis, and some combinations allow static instrumentation only. Dynamic instrumentation on macOS and Linux requires libxml2; missing dependencies may lead to an empty report. MTP excludes test assemblies by default unless configured otherwise. The free tooling is described in a repository of documentation and samples for closed-source coverage functionality.