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[Http Resilience] Update instructions how to fix a compatibility issue with App Insights #6147

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Mar 18, 2025
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[Http Resilience] Update instructions how to fix a compatibility issue with App Insights #6147

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4 changes: 2 additions & 2 deletions src/Libraries/Microsoft.Extensions.Http.Resilience/README.md
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Expand Up @@ -105,7 +105,7 @@ There's a build time check that verifies if you're using `Grpc.Net.ClientFactory

### Compatibility with .NET Application Insights

If you're using .NET Application Insights, then enabling resilience functionality in your application could cause all Application Insights telemetry to be missing. The issue occurs when resilience functionality is registered before Application Insights services. Consider the following sample causing the issue:
If you're using .NET Application Insights version **2.22.0** or lower, then enabling resilience functionality in your application could cause all Application Insights telemetry to be missing. The issue occurs when resilience functionality is registered before Application Insights services. Consider the following sample causing the issue:

```csharp
// At first, we register resilience functionality.
Expand All @@ -115,7 +115,7 @@ services.AddHttpClient().AddStandardResilienceHandler();
services.AddApplicationInsightsTelemetry();
```

The issue is caused by the following [bug](https://github.com/microsoft/ApplicationInsights-dotnet/issues/2879) in Application Insights and can be fixed by registering Application Insights services before resilience functionality, as shown below:
The issue can be fixed by updating .NET Application Insights to version **2.23.0** or higher. If you cannot update it, then registering Application Insights services before resilience functionality, as shown below, will fix the issue:

```csharp
// We register Application Insights first, and now it will be working correctly.
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