Azure-docs: Some examples don't work

[eddynaka]

in TimedHostedService class, we have a wrong variable:

telemetryClient.TrackEvent("Bing call event completed");

should be:

_telemetryClient.TrackEvent("Bing call event completed");

NET Core/.NET Framework Console application, if we create a new ConsoleApplication and copy that code, I receive the following error:
System.InvalidOperationException: 'No service for type 'Microsoft.ApplicationInsights.TelemetryClient' has been registered.' for the line:

var telemetryClient = serviceProvider.GetRequiredService<TelemetryClient>();

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Document Details

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• ID: 9d4fa84d-4cd3-216e-ca60-885f1565ee29
• Version Independent ID: 5c08427b-21d3-b22a-924a-d07d1461ba79
• Content: Application Insights for Worker Service apps (non-HTTP apps) - Azure Monitor
• Content Source: articles/azure-monitor/app/worker-service.md
• Service: azure-monitor
• Sub-service: application-insights
• GitHub Login: @mrbullwinkle
• Microsoft Alias: mbullwin

[eddynaka]

Just opened a PR solving the wrong naming and some issues in async/sync method. But, that still doesn't solve the problem with TelemetryClient.

[mrbullwinkle]

@eddynaka for your .NET Core/.NET Framework application are you testing with the code in this section which is specifically designed for that purpose:

https://docs.microsoft.com/azure/azure-monitor/app/worker-service#net-corenet-framework-console-application

I just re-tested this codeblock in a .NET Core console app and couldn't repro your issue.

[eddynaka]

I'm trying to figure out what are the differences between my project and the example one. Besides that, the PR just solves some compilation error when I copied / pasted in my project

[MonikaReddy-MSFT]

@eddynaka , I'm going to assign this to the document author so they can get your issue resolved.

[eddynaka]

Downloading from the GitHub code. Everything is working fine. Probably something here. U can close the issue, since we already solve the problem in the variables in the pr

[mrbullwinkle]

@eddynaka, thanks again for the fix! Going to close this one out now.

[mrbullwinkle]

please-close