Azure Cosmos DB .NET SDK v2 for API for NoSQL: Download and release notes (Legacy)
APPLIES TO: 
NoSQL
| Links | |
|---|---|
| Release notes | Release notes |
| SDK download | NuGet |
| API documentation | .NET API reference documentation |
| Samples | .NET code samples |
| Get started | Get started with the Azure Cosmos DB .NET SDK |
| Web app tutorial | Web application development with Azure Cosmos DB |
| Current supported framework | Microsoft .NET Framework 4.5 |
Warning
On August 31, 2024 the Azure Cosmos DB .NET SDK v2.x will be retired; the SDK and all applications using the SDK will continue to function; Azure Cosmos DB will simply cease to provide further maintenance and support for this SDK. We recommend migrating to the latest version of the .NET SDK v3 SDK.
Note
If you are using .NET Framework, please see the latest version 3.x of the .NET SDK, which targets .NET Standard.
Release history
Release history is maintained in the Azure Cosmos DB .NET SDK source repo. For a detailed list of feature releases and bugs fixed in each release, see the SDK changelog documentation
Recommended version
Different sub versions of .NET SDKs are available under the 2.x.x version. Version 2.x of this SDK will be retired on 31 August 2024 and you’ll need to update your SDK to version 3 by that date. Version 3 of the Azure Cosmos DB .NET SDK includes updated features and improved performance. We recommend following the instructions to migrate to Azure Cosmos DB .NET SDK version 3.
FAQ
How will I be notified of the retiring SDK?
Azure will provide 12 month's advance notice before the end of support of the retiring SDK to facilitate a smooth transition to a supported SDK. We'll notify you through various communication channels: the Azure portal, Azure updates, and direct communication to assigned service administrators.
Can I author applications by using a to-be-retired Azure Cosmos DB SDK during the 12-month period?
Yes, you'll be able to author, deploy, and modify applications by using the to-be-retired Azure Cosmos DB SDK during the 12-month notice period. We recommend that you migrate to a newer supported version of the Azure Cosmos DB SDK during the 12-month notice period, as appropriate.
After the retirement date, what happens to applications that use the unsupported Azure Cosmos DB SDK?
After the retirement date, Azure Cosmos DB will no longer make bug fixes, add new features, or provide support to the retired SDK versions. If you prefer not to upgrade, requests sent from the retired versions of the SDK will continue to be served by the Azure Cosmos DB service.
Which SDK versions will have the latest features and updates?
New features and updates will be added only to the latest minor version of the latest supported major SDK version. We recommend that you always use the latest version to take advantage of new features, performance improvements, and bug fixes. If you're using an old, non-retired version of the SDK, your requests to Azure Cosmos DB will still function, but you won't have access to any new capabilities.
What should I do if I can't update my application before a cutoff date?
We recommend that you upgrade to the latest SDK as early as possible. After an SDK is tagged for retirement, you'll have 12 months to update your application. If you're not able to update by the retirement date, requests sent from the retired versions of the SDK will continue to be served by Azure Cosmos DB, so your running applications will continue to function. But Azure Cosmos DB will no longer make bug fixes, add new features, or provide support to the retired SDK versions.
If you have a support plan and require technical support, contact us by filing a support ticket.
How can I request features be added to an SDK or connector?
New features are not always added to every SDK or connector immediately. If there is a feature not supported that you would like added, please add feedback to our community forum.
See also
To learn more about Azure Cosmos DB, see Azure Cosmos DB service page.