'宣言 Public Overridable Property ContextMenuStrip As System.Windows.Forms.ContextMenuStrip
'使用法 Dim instance As ExportOptionsFormBase Dim value As System.Windows.Forms.ContextMenuStrip instance.ContextMenuStrip = value value = instance.ContextMenuStrip
public virtual System.Windows.Forms.ContextMenuStrip ContextMenuStrip {get; set;}