'宣言 Public Shared ReadOnly Property ParentTop As LengthRef
'使用法 Dim value As LengthRef value = LengthRef.Predefined.ParentTop
public static LengthRef ParentTop {get;}
'宣言 Public Shared ReadOnly Property ParentTop As LengthRef
'使用法 Dim value As LengthRef value = LengthRef.Predefined.ParentTop
public static LengthRef ParentTop {get;}