Migrates .NET projects from System.Data.SqlClient to Microsoft.Data.SqlClient, handling package references, namespace updates, connection string encryption changes, and behavioral differences. Use when upgrading SqlClient, replacing System.Data.SqlClient, migrating to Microsoft.Data.SqlClient, or modernizing SQL Server data access in C# or VB.NET projects (.csproj, .vbproj, .cs, .vb files).
Install
npx skills add microsoft/upgrade-agent-plugins --skill migrating-to-microsoft-data-sqlclientnpx skills add microsoft/upgrade-agent-plugins --skill migrating-to-microsoft-data-sqlclient -a claude-code -gnpx skills add microsoft/upgrade-agent-plugins --skill migrating-to-microsoft-data-sqlclient -a codex -ggemini skills install https://github.com/microsoft/upgrade-agent-plugins.git --path plugins/upgrade-agent/upgrade/dotnet/skills/lazy/data/migrating-to-microsoft-data-sqlclientgh skill install microsoft/upgrade-agent-plugins migrating-to-microsoft-data-sqlclientgit 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/data/migrating-to-microsoft-data-sqlclient ~/.claude/skills/migrating-to-microsoft-data-sqlclient # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/data/migrating-to-microsoft-data-sqlclient ~/.agents/skills/migrating-to-microsoft-data-sqlclient # Codex, Cursor, Gemini CLI, Copilot, OpenCode