C# and .NET testing patterns with xUnit, FluentAssertions, mocking, integration tests, and test organization best practices. Use when writing or reviewing xUnit tests, mocks, or integration tests in a C# / .NET project.
Install
npx skills add affaan-m/ECC --skill csharp-testingnpx skills add affaan-m/ECC --skill csharp-testing -a claude-code -gnpx skills add affaan-m/ECC --skill csharp-testing -a codex -ggemini skills install https://github.com/affaan-m/ECC.git --path docs/zh-CN/skills/csharp-testinggh skill install affaan-m/ECC csharp-testinggit clone --depth 1 https://github.com/affaan-m/ECC /tmp/affaan-m__ECC
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/affaan-m__ECC/docs/zh-CN/skills/csharp-testing ~/.claude/skills/csharp-testing # Claude Code
cp -R /tmp/affaan-m__ECC/docs/zh-CN/skills/csharp-testing ~/.agents/skills/csharp-testing # Codex, Cursor, Gemini CLI, Copilot, OpenCode