TargetPlatformAttribute
namespace System.Runtime.Versioning
{
    [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = false, Inherited = false)]
    internal sealed class TargetPlatformAttribute : System.Runtime.Versioning.OSPlatformAttribute
    {
        public TargetPlatformAttribute(string platformName)
            : base(platformName)
        {
        }
    }
}