'宣言 Public ReadOnly Property TopLeft As PointD
'使用法 Dim instance As RectangleD Dim value As PointD value = instance.TopLeft
public PointD TopLeft {get;}
'宣言 Public ReadOnly Property TopLeft As PointD
'使用法 Dim instance As RectangleD Dim value As PointD value = instance.TopLeft
public PointD TopLeft {get;}