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Welcome to the home of the Microsoft ADO.NET driver for SQL Server aka the Microsoft.Data.SqlClient GitHub repository.

Microsoft.Data.SqlClient is a data provider for Microsoft SQL Server and Azure SQL Database. Now in General Availability, it is a union of the two System.Data.SqlClient components which live independently in .NET Framework and .NET Core. Going forward, support for new SQL Server features will be implemented in Microsoft.Data.SqlClient.

The Microsoft.Data.SqlClient package supports the below environments:

• .NET Framework 4.6.2+
• .NET Core 3.1+
• .NET Standard 2.0+

The source code of this library is now available under the MIT license.

The Microsoft.Data.SqlClient NuGet package is available onNuGet.org.

For the .NET Framework driver on Windows, a package reference toMicrosoft.Data.SqlClient.SNI loads nativeMicrosoft.Data.SqlClient.SNI.x64.dll andMicrosoft.Data.SqlClient.SNI.x86.dll libraries into the client's build directories.

For the .NET Core driver on Windows, a package reference toMicrosoft.Data.SqlClient.SNI.runtime loadsarm,arm64,x64 andx86 nativeMicrosoft.Data.SqlClient.SNI.dll libraries into the client's build directories.

Special thanks to everyone who has contributed to the project.We thank you for your continuous support in improving the SqlClient library!

• Wraith (@Wraith2)
• Erik Ejlskov Jensen (@ErikEJ)
• Simon Cropp (@SimonCropp)
• Stefán Jökull Sigurðarson (@stebet)
• Shay Rojansky (@roji)
• Stephen Toub (@stephentoub)
• Rasmus Melchior Jacobsen (@rmja)
• Phillip Haydon (@phillip-haydon)
• Robin Sue (@Suchiman)

Up-to-date list of contributors:Contributor Insights

All preview and stable driver release notes are available underrelease-notes.

Refer toporting-cheat-sheet.md for a safe porting experience from System.Data.SqlClient to Microsoft.Data.SqlClient and share your experience with us by advancing this guide for future developers.

Check out ourFAQ. Still not answered? Create anissue to ask a question.

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The Microsoft.Data.SqlClient Driver for SQL Server is licensed under the MIT license. See theLICENSE file for more details.

This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft trademarks or logos is subject to and must follow Microsoft's Trademark & Brand Guidelines. Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship. Any use of third-party trademarks or logos are subject to those third-party's policies.