Add Net90 to FrameworkConstants.CommonFrameworks

[rhjoerg]

NuGet Product(s) Involved

NuGet SDK

The Elevator Pitch

This request affects the project Nuget.Frameworks.

Its class FrameworkConstants.CommonFrameworks is missing a value for the tfm "net9.0".

The line to add would be:

public static readonly NuGetFramework Net90 = new NuGetFramework(FrameworkIdentifiers.NetCoreApp, Version9);

The constant Version9 has to be added to the class FrameworkConstants for this to work:

public static readonly Version Version9 = new Version(9, 0, 0, 0);

Additional Context and Details

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