Document the TargetPlatformMoniker for .NET 5 era frameworks

[nkolev92]

For a framework with a platform such as android/windows/linux, there are 2 parts.

TargetFrameworkMoniker, usually denoting the netX.Y part, ex. .NETCoreApp,Version=7.0
TargetPlatformMoniker, usually denoting the PlatformNameA.B ex. Windows=Version=7.0

If you create a project for say android such as net7.0-android, the .NET SDK would automatically add a TargetPlatformVersion. That is something that is known by the SDK only at build time.

I couldn't find anything documenting this logic, or anything correlating platform version with which version of the SDK is supported for example or something explaining the meaning of the platform versions.

https://github.com/NuGet/docs.microsoft.com-nuget/issues/3076 is relevant. NuGet simply doesn't know the available framework.

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Document Details

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• ID: 49205137-dcec-a120-e5e7-1b9c79cdafbb
• Version Independent ID: 4352856b-5ccf-8e62-48b4-3151340cac56
• Content: Target frameworks in SDK-style projects - .NET
• Content Source: docs/standard/frameworks.md
• Product: dotnet
• Technology: dotnet-standard
• GitHub Login: @gewarren
• Microsoft Alias: gewarren

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Associated WorkItem - 156746

[gewarren]

@baronfel Can you help me with this one and explain how the SDK chooses a target platform version for an OS-specific TFM for commands like dotnet pack?