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;

               }

           };

        }