Merge pull request #304057 from zhiyuanliang-ms/zhiyuanliang/dotnet-provider-health-check

Azure App Configuration - Add health check doc

Author: prmerger-automator[bot]

articles/azure-app-configuration/configuration-provider-overview.md

@@ -69,7 +69,7 @@ Replica Failover | [GA](./reference-dotnet-provider.md#geo-replication) | GA | G
 Replica Load Balancing | [GA](./reference-dotnet-provider.md#geo-replication) | WIP | GA | GA | [GA](./reference-javascript-provider.md#geo-replication) | WIP
 Snapshots | [GA](./reference-dotnet-provider.md#snapshot) | GA | GA | WIP | [GA](./reference-javascript-provider.md#snapshot) | WIP
 Distributed Tracing | [GA](./reference-dotnet-provider.md#distributed-tracing) | WIP | WIP | WIP | WIP | WIP
-Health Check | WIP | GA | WIP | WIP | WIP | WIP 
+Health Check | [GA](./reference-dotnet-provider.md#health-check) | WIP | WIP | WIP | WIP | WIP 
 Select by Tag Filters | [GA](./reference-dotnet-provider.md#load-specific-key-values-using-selectors) | WIP | WIP | GA | WIP | WIP 
 
 ## Support policy

articles/azure-app-configuration/reference-dotnet-provider.md

@@ -673,6 +673,22 @@ builder.Services.AddOpenTelemetry()
 
 For more information about OpenTelemetry in .NET, see the [OpenTelemetry .NET documentation](https://github.com/open-telemetry/opentelemetry-dotnet).
 
+## Health check
+
+The Azure App Configuration .NET provider supports [.NET app health checks](/dotnet/core/diagnostics/diagnostic-health-checks). To enable health checks, you can call `AddAzureAppConfiguration()` method on `IHealthChecksBuilder`, which will add an `IHealthCheck` with a default registration name of `"Microsoft.Extensions.Configuration.AzureAppConfiguration"`.
+
+```C#
+builder.Configuration.AddAzureAppConfiguration(options => 
+    options.Connect(new Uri(appConfigEndpoint), new DefaultAzureCredential()));
+
+builder.Services.AddHealthChecks()
+    .AddAzureAppConfiguration();
+```
+
+The .NET provider will be considered as unhealthy when the last load or refresh attempt failed.
+
+For more information about health checks in .NET, see the [.NET health monitoring documentation](/dotnet/architecture/microservices/implement-resilient-applications/monitor-app-health).
+
 ## Next steps
 
 To learn how to use the .NET configuration provider, continue to the following tutorial.