'宣言 Public ReadOnly Property Line As LinePropsBase
'使用法 Dim instance As RenderLineBase Dim value As LinePropsBase value = instance.Line
public LinePropsBase Line {get;}
'宣言 Public ReadOnly Property Line As LinePropsBase
'使用法 Dim instance As RenderLineBase Dim value As LinePropsBase value = instance.Line
public LinePropsBase Line {get;}