Structures WinForms applications with Designer-compatible patterns, proper code organization, and build/runtime compatibility. Use when creating or maintaining WinForms projects, working with Form or UserControl classes, organizing InitializeComponent vs application logic, implementing Application.Run patterns, handling Program.cs and ApplicationConfiguration, managing Application.SetHighDpiMode…
Install
npx skills add microsoft/upgrade-agent-plugins --skill building-winforms-applicationsnpx skills add microsoft/upgrade-agent-plugins --skill building-winforms-applications -a claude-code -gnpx skills add microsoft/upgrade-agent-plugins --skill building-winforms-applications -a codex -ggemini skills install https://github.com/microsoft/upgrade-agent-plugins.git --path plugins/upgrade-agent/upgrade/dotnet/skills/lazy/desktop/winforms/building-winforms-applicationsgh skill install microsoft/upgrade-agent-plugins building-winforms-applicationsgit clone --depth 1 https://github.com/microsoft/upgrade-agent-plugins /tmp/microsoft__upgrade-agent-plugins
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/desktop/winforms/building-winforms-applications ~/.claude/skills/building-winforms-applications # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/desktop/winforms/building-winforms-applications ~/.agents/skills/building-winforms-applications # Codex, Cursor, Gemini CLI, Copilot, OpenCode