private void BtnCapnhat_CD_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
 {
     if (DMCongDoan == null || DMCongDoan.IsDisposed)
     {
         DMCongDoan = new frmDM_CONGDOAN();
         DMCongDoan.Show();
         frmDM_CONGDOAN.ActiveForm.TopMost = true;
     }
 }
        private void btnCongdoan_Click(object sender, EventArgs e)
        {
            frmDM_CONGDOAN DMCONGDOAN = new frmDM_CONGDOAN();

            DMCONGDOAN.ShowDialog();
        }