Update UserAgent to use AssemblyFileVersion

[rido-min]

Changed version retrieval in UserAgent property from Assembly.GetExecutingAssembly().GetName().Version to ThisAssembly.AssemblyFileVersion for improved accuracy.

This pull request makes a minor update to how the application version is determined for the UserAgent string. The code now uses ThisAssembly.AssemblyFileVersion instead of the executing assembly's version, which provides a more accurate and consistent version number.

(Libraries/Microsoft.Teams.Apps/App.csL49-R49)

[Copilot]

Pull request overview

This pull request updates the version retrieval mechanism for the UserAgent property in the App class. The change replaces the reflection-based approach (Assembly.GetExecutingAssembly().GetName().Version?.ToString()) with a compile-time constant from Nerdbank.GitVersioning (ThisAssembly.AssemblyFileVersion).

Key Changes:

• Simplified version retrieval by using ThisAssembly.AssemblyFileVersion instead of runtime reflection
• Leverages the Nerdbank.GitVersioning package already configured in the project

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[Copilot]

The null-coalescing assignment on line 50 is now dead code. ThisAssembly.AssemblyFileVersion returns a non-nullable string (generated by Nerdbank.GitVersioning), so the fallback to "0.0.0" will never execute. Consider either removing the null check or directly assigning the value without it.

Suggested change

version ??= "0.0.0";

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