xtraTabbedMdiManager 双击最大化和关闭后返回主界面 z

双击tab头部时候子窗体Float时界面最大化和关闭Float状态的子窗体并不是真正关闭而是回到主界面的问题，
代码如下，其中xtraTabbedMdiManager1_Floating这个是xtraTabbedMdiManager的Floating事件的实现

private void xtraTabbedMdiManager1_Floating(object sender, DevExpress.XtraTabbedMdi.FloatingEventArgs e)
 
        {
 
            //Mdi模式下子窗体Float时候窗体最大化和关闭时候自动回到Tab设置
 
            e.ChildForm.WindowState = FormWindowState.Maximized;
 
            e.ChildForm.FormClosing += (s, es) =>
 
           {
 
               if (xtraTabbedMdiManager1.ActiveFloatForm == (s as Form))
 
               {
 
                   es.Cancel = true;
 
                   xtraTabbedMdiManager1.FloatForms.Remove(s as Form);
 
                   e.ChildForm.MdiParent = this;
 
               }
 
           };
 
        }