revert part of change

Author: mrbullwinkle

articles/azure-monitor/app/api-custom-events-metrics.md

@@ -59,10 +59,9 @@ If you use AzureFunctions v2+ or Azure WebJobs v3+ - follow this document: https
 *C#*
 
 ```csharp
-TelemetryConfiguration telemetry = TelemetryConfiguration.CreateDefault();
-var TelemetryClient = new TelemetryClient(telemetry);
+private TelemetryClient telemetry = new TelemetryClient();
 ```
-For anyone using the now obsolete method please visit [microsoft/ApplicationInsights-dotnet#1152](https://github.com/microsoft/ApplicationInsights-dotnet/issues/1152) for further details.
+For anyone seeing this method is obsolete messages please visit [microsoft/ApplicationInsights-dotnet#1152](https://github.com/microsoft/ApplicationInsights-dotnet/issues/1152) for further details.
 
 *Visual Basic*