public void LoadData()
 {
     try
     {
         SystemUserExtsBO aSystemUserExtsBO = new SystemUserExtsBO();
         dgvSystemUserExts.DataSource = aSystemUserExtsBO.Select_All();
     }
     catch (Exception ex)
     {
         MessageBox.Show("frmLst_SystemUserExts.LoadData\n"+ex.ToString(), "Lỗi", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
 }