/// <summary>
        ///
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btThemDanToc_Click(object sender, EventArgs e)
        {
            frmDanToc frm_DanToc = new frmDanToc(this.DanTocController);

            frm_DanToc.WindowState = FormWindowState.Normal;
            frm_DanToc.Show();
        }
 //////////////////////////////////////////////////////////
 //Menu quan ly
 private void miQLDanToc_Click(object sender, EventArgs e)
 {
     if (this.frm_DanToc == null || this.frm_DanToc.IsDisposed)
     {
         frm_DanToc           = new frmDanToc();
         frm_DanToc.MdiParent = this;
         frm_DanToc.Show();
     }
 }