[銀光] http://schemas.microsoft.com/expression/blend/2008 is not resolved

如果出現了
http://schemas.microsoft.com/expression/blend/2008 is not resolved
這個錯誤
那一定就是少加了以下這三條

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"