anchor.diff:          | _ -> None
   
   [<RequireQualifiedAccess>]
  +type Net6WindowsVersion =
  +    | V7_0
  +    | V8_0
  +    | V10_0_17763_0
  +    | V10_0_18362_0
  +    | V10_0_19041_0
  +    override this.ToString() =
  +        match this with
  +        | V7_0 -> "7.0"
  +        | V8_0 -> "8.0"
  +        | V10_0_17763_0 -> "10.0.17763.0"
  +        | V10_0_18362_0 -> "10.0.18362.0"
  +        | V10_0_19041_0 -> "10.0.19041.0"
  +
  +    static member TryParse s =
  +        match s with
  +        | "" | "7.0" | "7" -> Some Net6WindowsVersion.V7_0
  +        | "8.0" | "8" -> Some Net6WindowsVersion.V8_0
  +        | "10.0.17763.0" | "10.0.17763" -> Some Net6WindowsVersion.V10_0_17763_0
  +        | "10.0.18362.0" | "10.0.18362" -> Some Net6WindowsVersion.V10_0_18362_0
  +        | "10.0.19041.0" | "10.0.19041" -> Some Net6WindowsVersion.V10_0_19041_0
  +        | _ -> None
  +
  +[<RequireQualifiedAccess>]
   type Net5Os =
       | Android
       | IOs
  
positive.code:         | DotNet5Windows Net5WindowsVersion.V10_0_17763_0 -> [ DotNetFramework FrameworkVersion.V5; DotNet5Windows Net5WindowsVersion.V8_0 ]
          | DotNet5Windows Net5WindowsVersion.V10_0_18362_0 -> [ DotNetFramework FrameworkVersion.V5; DotNet5Windows Net5WindowsVersion.V10_0_17763_0 ]
          | DotNet5Windows Net5WindowsVersion.V10_0_19041_0 -> [ DotNetFramework FrameworkVersion.V5; DotNet5Windows Net5WindowsVersion.V10_0_18362_0 ]
          | DotNetStandard DotNetStandardVersion.V1_0 -> [  ]
          | DotNetStandard DotNetStandardVersion.V1_1 -> [ DotNetStandard DotNetStandardVersion.V1_0 ]
          | DotNetStandard DotNetStandardVersion.V1_2 -> [ DotNetStandard DotNetStandardVersion.V1_1 ]
  
negative.code: // Each time a new version is added NuGetPackageCache.CurrentCacheVersion should be bumped.
  type FrameworkIdentifier =
      | DotNetFramework of FrameworkVersion
      | DotNet6WithOs of Net6Os
      | DotNet6Windows of Net6WindowsVersion
      | DotNet5WithOs of Net5Os
      | DotNet5Windows of Net5WindowsVersion
      | UAP of UAPVersion
  