Microsoft.Testing.Extensions.Telemetry blocked from upgrading to latest Microsoft.ApplicationInsights

[johnthcall]

I was looking into an issue where Microsoft.Testing.Extensions.Telemetry on .net 9 was still fetching System.Diagnostics.DiagnosticSource 5.0.0 due to Microsoft.ApplicationInsights dependency. I noticed that Microsoft.ApplicationInsights has released major version 3 which no longer has System.Diagnostics.DiagnosticSource however it no longer supports netStandard2.0 as part of microsoft/ApplicationInsights-dotnet#3091.

Microsoft.Testing.Extensions.Telemetry and Microsoft.Testing.Extensions.VSTestBridge will need to choose a route:

1. Drop netStandard2.0 in favor of .NETFramework 4.6.2 or higher
2. See if ApplicationInsights restores NetStandard2.0 (dropped due to difficulty with OpenTelemetry Dropped .Net Standard 2.0 in 3.0.0 causes dependent package complications ApplicationInsights-dotnet#3130)
3. Forever stay on Microsoft.ApplicationInsights 2.23.0
4. Drop ApplicationInsights support

[Evangelink]

If I recall right we were limited on the version to use by integration. @MarcoRossignoli do you recall the full story here?

[MarcoRossignoli]

We're aligned with the SDK one if I recall well!

[Evangelink]

@drognanar it seems you were touching that, do you have some info?

[drognanar]

@Evangelink I'm not aware of any restrictions on the ApplicationInsights depenedency, besides being compatible with the TFMs that Microsoft.Testing.Platform core is shipping with