private void btnThemLoaiTK_Click(object sender, EventArgs e)
        {
            frmThemLoaiTaiKhoan frm = new frmThemLoaiTaiKhoan();

            frm.ShowDialog();
            LoadLoaiTaiKhoan();
        }
        private void btnEditLoai_Click(object sender, EventArgs e)
        {
            int    ID               = int.Parse(gvLoaiTK.GetRowCellValue(gvLoaiTK.FocusedRowHandle, "ID").ToString());
            string tenLoai          = gvLoaiTK.GetRowCellValue(gvLoaiTK.FocusedRowHandle, "TenLoai").ToString();
            frmThemLoaiTaiKhoan frm = new frmThemLoaiTaiKhoan(ID, tenLoai);

            frm.ShowDialog();
            LoadLoaiTaiKhoan();
        }