明確以 Windows SDK 為目標時，不支援 .NET Framework 版本 "<var>X</var>"，只有 .NET 4.5 (含) 以後版本才支援。請由 Version45 以上的列舉 Microsoft.Build.Utilities.TargetDotNetFrameworkVersion 中指定一個值。

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.NET Framework version "<var>X</var>" is not supported when explicitly targeting the Windows SDK, which is only supported on .NET 4.5 and later. Please specify a value from the enumeration Microsoft.Build.Utilities.TargetDotNetFrameworkVersion that is Version45 or above.

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