'宣言 Public ReadOnly Property SelectAll As ButtonPreviewElement
'使用法 Dim instance As ContextMenuElements Dim value As ButtonPreviewElement value = instance.SelectAll
public ButtonPreviewElement SelectAll {get;}
'宣言 Public ReadOnly Property SelectAll As ButtonPreviewElement
'使用法 Dim instance As ContextMenuElements Dim value As ButtonPreviewElement value = instance.SelectAll
public ButtonPreviewElement SelectAll {get;}