Upgrade ASP.NET Web Forms projects to modern .NET. Use when the user wants to upgrade, migrate, modernize, port, convert, or move Web Forms / WebForms / .aspx pages to any modern .NET. framework.
Install
npx skills add microsoft/upgrade-agent-plugins --skill webforms-to-blazor-upgradenpx skills add microsoft/upgrade-agent-plugins --skill webforms-to-blazor-upgrade -a claude-code -gnpx skills add microsoft/upgrade-agent-plugins --skill webforms-to-blazor-upgrade -a codex -ggemini skills install https://github.com/microsoft/upgrade-agent-plugins.git --path plugins/upgrade-agent/upgrade/dotnet/skills/scenarios/webforms-to-blazor-upgradegh skill install microsoft/upgrade-agent-plugins webforms-to-blazor-upgradegit 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/scenarios/webforms-to-blazor-upgrade ~/.claude/skills/webforms-to-blazor-upgrade # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/scenarios/webforms-to-blazor-upgrade ~/.agents/skills/webforms-to-blazor-upgrade # Codex, Cursor, Gemini CLI, Copilot, OpenCode