Null Object when calling AddApplicationInsightsTelemetry / AddSingletonIfNotExists

[michael-paulus-icev]

• List of NuGet packages and version that you are using:

• <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.22.0" />
  

• Runtime version (e.g. net 8.0): net 8.0
• Hosting environment local: windows

Describe the bug

After registering a AddResiliencePipeline from the Polly library, it causes an exception be thrown on

https://github.com/microsoft/ApplicationInsights-dotnet/blob/master/NETCORE/src/Shared/Extensions/ApplicationInsightsExtensions.cs

Line:

292

both the ImplementationType && ImplementationInstance are null but ImplementationInstance is not null checked.

This is happening because it is using the KeyedImplementation properties instead.

[JJong-nl]

This will be solved in 2.23.0
see #2908

temporary fix would be to call the AddApplicationInsights... before a keyed service is added to the ServiceCollection