foreach (TabPage page in TabControl1.TabPages)//遍历得到和关闭的选项卡一样的Text
{

            if (page.Text == name)
            {
                pageindex = page.TabIndex;
                TabControl1.TabPages.Remove(page);

                foreach (Control t in page.Controls)
                {
                    if (t is System.Windows.Forms.Form)
                        (t as Form).Close();
                }
                page.Dispose();
                TabControl1.SelectedTabPageIndex = pageindex - 1;
                return;
            }

do{shutdown}就可以了😃

先关闭Timer再remove。。。