Tracing + Telemetry using .NET and Application Insights

trace.cs

// Reading
// https://tsuyoshiushio.medium.com/correlation-with-activity-with-application-insights-1-overview-753a48a645fb
// https://tsuyoshiushio.medium.com/correlation-with-activity-with-application-insights-2-activity-deep-dive-2a4147919659
// https://medium.com/prospa-engineering/implementing-distributed-tracing-with-azures-application-insights-5a09cc1c200c

var activity = new Activity("Call to CosmosDB");
// activity.SetParentId("correlation id from request")

//RequestTelemetry for Request, DependencyTelemtry for Dependencies
using var operation = telemetryClient.StartOperation<DependencyTelemetry>(activity); 

Try {
  // call cosmos db
} Catch (Exception e) {
   operation.Telemetry.Success = false;
   telemetryClient.TrackException(e);
} 
Finally {
   telemetryClient.StopOperation(operation);
}