'宣言 Public Shared ReadOnly PlaceHolderProperty As Windows.UI.Xaml.DependencyProperty
public static readonly Windows.UI.Xaml.DependencyProperty PlaceHolderProperty
'宣言 Public Shared ReadOnly PlaceHolderProperty As Windows.UI.Xaml.DependencyProperty
public static readonly Windows.UI.Xaml.DependencyProperty PlaceHolderProperty