例子中 DummyTaskList的属性this.HideOnClose = true;这样该控件关闭时候就不会释放。具体代码调用如下 formcontrol.click----> >    WeifenLuo.WinFormsUI.Docking.dll!WeifenLuo.WinFormsUI.Docking.VS2005DockPaneCaption.Close_Click(object