The Azure SDK team is pleased to announce our November 2019 client library releases. This represents the first GA release of a ground-up rewrite of our client libraries to ensure consistency, idiomatic design, productivity, and an excellent developer experience.

This release includes the following:


  • Storage (Blobs, Queues)
  • Key Vault (Secrets, Keys)
  • Identity


  • Storage (Files)
  • Event Hubs
  • Cosmos
  • App Configuration

Installation Instructions

To install any of our packages, please search for them via Manage NuGet Packages... in Visual Studio (with Include prerelease checked) or copy these commands into your terminal:

$> dotnet add package Azure.Storage.Blobs
$> dotnet add package Azure.Storage.Blobs.Batch
$> dotnet add package Azure.Storage.Queues
$> dotnet add package Azure.Storage.Files.Shares --version 12.0.0-preview.5

$> dotnet add package Azure.Security.KeyVault.Secrets
$> dotnet add package Azure.Security.KeyVault.Key
$> dotnet add package Azure.Security.KeyVault.Certificates --version 4.0.0-preview.6

$> dotnet add package Azure.Messaging.EventHubs --version 5.0.0-preview.5

$> dotnet add package Azure.Identity

$> dotnet add package Azure.Data.AppConfiguration --version 1.0.0-preview.4

$> dotnet add package Azure.Cosmos --version 4.0.0-preview


If you have a bug or feature request for one of the libraries, please file an issue in our repo.


Detailed changelogs are linked from the Quick Links below. Here are some of the highlights:

  • New client libraries were created using the Azure SDK Design Guidelines for .NET resulting in consistent API patterns and shared features like automatic retries, authentication, logging, configurable transport pipelines, exceptions, mocking, etc.
  • Support for Azure Active Directory credentials using our new Identity library that embrace the future of authentication across Azure services.
  • Parity across synchronous and asynchronous APIs offering a choice appropriate to your application.
  • Updated dependencies on the latest (preview-7) version of Azure.Core library.


  • Renamed Azure.Storage.Blobs.Batching to Azure.Storage.Blobs.Batch for consistency with other platforms
  • Renamed Azure.Storage.Files to Azure.Storage.Files.Shares to better align with the newly released Azure.Storage.Files.DataLake and provide a consistent set of APIs for working with files on Azure
  • Renamed a number of operations and models to better align with other client libraries and the .NET Framework Design Guidelines
  • Bug fixes

Azure Identity

  • Various types have been renamed. See the Identity changelog for details.
  • Updated exception model across the Azure.Identity library.
    • TokenCredential implementations in the Azure.Identity library now throw exceptions rather than returning default(AccessToken) when no token is obtained
    • Added the CredentialUnavailableExcpetion exception type to distinguish cases when failure to obtain an AccessToken was expected

Event Hubs

  • The early stages of a large refactoring of the Event Hub client type hierarchy are complete. For more details, please see the Event Hubs changelog.
  • Cancellation tokens are now fully supported throughout the client hierarchy and across operations.
  • The information about the last event enqueued to a partition is now presented as an immutable object, if the tracking option was enabled.
  • Retry policies and timeouts have been made local to a specific client instance, making them easier to configure and reason about.
  • Client types using Azure identity for authorization should now be working properly; a bug was fixed to allow the proper authorization scopes to be requested. (A community contribution, courtesy of albertodenatale)

Key Vault

  • Key has been renamed to KeyVaultKey to avoid ambiguity with other libraries and to yield better search results.
  • KeyClient.GetKeys and KeyClient.GetKeyVersions have been renamed to KeyClient.GetPropertiesOfKeys and KeyClient.GetPropertiesOfKeyVersions respectively.
  • KeyClient.DeleteKey has been renamed to KeyClient.StartDeleteKey and now returns a DeleteKeyOperation to track this long-running operation.
  • Secret has been renamed to KeyVaultSecret to avoid ambiguity with other libraries and to yield better search results.
  • SecretClient.GetSecrets and SecretClient.GetSecretVersions have been renamed to SecretClient.GetPropertiesOfSecrets and SecretClient.GetPropertiesOfSecretVersions respectively.
  • SecretClient.DeleteSecret has been renamed to SecretClient.StartDeleteSecret and now returns a DeleteSecretOperation to track this long-running operation.
  • Various other types have been renamed. See the Key Vault Keys and Secrets changelogs for details.
  • The Certificates client library has been updated to work with the 1.0.0 release versions of Azure.Core and Azure.Identity.

App Configuration

  • Changed ConfigurationClient method names to align with client methods in other Azure SDK libraries.
  • Made terminology consistent around IsReadOnly.
  • Removed methods and properties exposing unnecessary complexity, including a SetConfigurationSetting overload and the ConfigurationClientOptions.Version property.
  • Fixed a bug causing incorrect request signing on retries.
  • Made ConfigurationSetting serializable by System.Text.Json serializers.
  • Additional API improvements; see App Configuration changelog for further details.


  • Initial 4.0.0 preview release.
Service Package Readme Samples API Reference Changelog
App Configuration Azure.Data.AppConfiguration - 1.0.0-preview.4 ReadMe Samples Api Reference ChangeLog
Core Azure.Core - 1.0.0 ReadMe Samples Api Reference ChangeLog
EventHubs Azure.Messaging.EventHubs - 5.0.0-preview.5 ReadMe Samples Api Reference ChangeLog
Identity Azure.Identity - 1.0.0 ReadMe N/A Api Reference ChangeLog
Key Vault - Certificates Azure.Security.KeyVault.Certificates - 4.0.0-preview.7 ReadMe Samples Api Reference ChangeLog
Key Vault - Keys Azure.Security.KeyVault.Keys - 4.0.0 ReadMe Samples Api Reference ChangeLog
Key Vault - Secrets Azure.Security.KeyVault.Secrets - 4.0.0 ReadMe Samples Api Reference ChangeLog
Storage - Blobs Azure.Storage.Blobs - 12.0.0 ReadMe Samples Api Reference ChangeLog
Storage - Blobs Batch Azure.Storage.Blobs.Batch - 12.0.0 ReadMe N/A Api Reference ChangeLog
Storage - Common Azure.Storage.Common - 12.0.0 ReadMe Samples Api Reference ChangeLog
Storage - DataLake Azure.Storage.Files.DataLake - 12.0.0-preview.6 ReadMe Samples N/A ChangeLog
Storage - File Shares Azure.Storage.Files.Shares - 12.0.0-preview.5 ReadMe Samples Api Reference ChangeLog
Storage - Queues Azure.Storage.Queues - 12.0.0 ReadMe Samples Api Reference ChangeLog