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NuGet · #332 most downloaded on NuGet
This is the Microsoft Azure Application Configuration Service client library
Last release 1 months ago
18 Aug 2026
Ships fairly regularly
a new release about every 3 months
Nearly every release is documented
notes for 19 of 19 stable releases
Nothing withdrawn
no release was ever pulled
7 years old
19 releases · first in 2020
One column per quarter.
Fixed GetRevisions and GetRevisionsAsync throwing a UriFormatException when retrieving subsequent pages. #62095
GetRevisions and GetRevisionsAsync throwing a UriFormatException when retrieving subsequent pages. #62095Improved authentication in sovereign clouds (such as Bleu) when using a TokenCredential. Previously, if you did not set ConfigurationClientOptions.Aud
TokenCredential. Previously, if you did not set ConfigurationClientOptions.Audience, the client fell back to the Azure Public Cloud audience and authentication could fail. The client now infers the correct Microsoft Entra audience from your App Configuration endpoint, so no additional configuration is required. Public, Azure China, and Azure US Government endpoints continue to work as before, and you can still set Audience explicitly to override the inferred value.Code | Docs
Support: Active
App Configuration Provider
Microsoft.Extensions.Configuration.AzureAppConfiguration
Added a Description property on ConfigurationSetting and ConfigurationSnapshot to associate descriptive text with settings and snapshots.
Description property on ConfigurationSetting and ConfigurationSnapshot to associate descriptive text with settings and snapshots.SettingFields.Description so Description can be requested when retrieving configuration settings.2024-09-01 and 2026-04-01 (default) service API versions.Added ConfigurationClientSettings to support creating a ConfigurationClient from IConfiguration, including configuration-based credential resolution a
ConfigurationClientSettings to support creating a ConfigurationClient from IConfiguration, including configuration-based credential resolution and dependency injection registration.Added new methods, CheckConfigurationSettings and CheckConfigurationSettingsAsync, which can be used to check settings from the Azure App Configuratio
CheckConfigurationSettings and CheckConfigurationSettingsAsync, which can be used to check settings from the Azure App Configuration store using HEAD requests, returning only headers without the response body. #54669Added internal pipeline policy to normalize (case-insensitive alphabetical) ordering of query parameters for deterministic request URLs.
Added AOT annotations to support AOT compilation.
Added support for specifying the token credential's Microsoft Entra audience when creating a client.
Added support for listing labels.
Fixed a bug introduced in version 1.3.0 where the GetConfigurationSetting method incorrectly logged 304 responses as failures in distributed tracing.
GetConfigurationSetting method incorrectly logged 304 responses as failures in distributed tracing.Added ConfigurationSettingPageableExtensions class to support new Pageable .AsPages and AsyncPageable .AsPages extension methods. This replaces Settin
ConfigurationSettingPageableExtensions class to support new Pageable<ConfigurationSetting>.AsPages and AsyncPageable<ConfigurationSetting>.AsPages extension methods. This replaces SettingSelector.MatchConditions.MatchConditions from SettingSelector.Code | Docs
Support: Active
Communication Common
Azure.Communication.Common
Added configuration settings snapshot feature which allow users to create a point-in-time snapshot of their configuration store.
key tag reported on ConfigurationClient activities to az.appconfiguration.key following OpenTelemetry attribute naming conventions.FeatureFlagConfigurationSetting and SecretReferenceConfigurationSetting will now retain custom attributes in the setting value. Previously, only attri
FeatureFlagConfigurationSetting and SecretReferenceConfigurationSetting will now retain custom attributes in the setting value. Previously, only attributes that were defined in the associated JSON schema were allowed and unknown attributes were discarded.FeatureFlagConfigurationSetting and SecretReferenceConfigurationSetting instances with an ETag, matching ConfigurationSetting. This allows all setting types to use the GetConfigurationSettingAsync overload that accepts onlyIfUnchanged. Previously, this was not possible for specialized settings types.FeatureFlagConfigurationSetting and SecretReferenceConfigurationSetting instances for testing purposes using the ConfigurationModelFactory. It was previously not possible to populate service-owned fields when testing.ConfigurationSetting that was intended for testing purposes as non-visible, as the ConfigurationModelFactory should instead be used.HttpMessageHandler that returns StringContent.Added a ConfigurationSetting constructor parameter to set an ETag.
ConfigurationSetting constructor parameter to set an ETag.The GetConfigurationSettingAsync overload that takes an instance of MatchConditions temporary removed.
GetConfigurationSettingAsync overload that takes an instance of MatchConditions temporary removed.### Changes - Dependency versions updated.
Provide AddConfigurationClient with support for TokenCredential
Update the tag list for the AzConfig package
Keys and Labels properties in SettingSelector are replaced with KeyFilter and LabelFilter to provide full filtering support.
Keys and Labels properties in SettingSelector are replaced with KeyFilter and LabelFilter to provide full filtering support.ConfigurationClient.Your coding agent can read these notes before it upgrades. Set up the MCP server →