private void txtNgayVao_Properties_EditValueChanged(object sender, EventArgs e) { ThamSoBUS.SetKhoangThoiGianToiThieuGiuaHaiLanThue(Convert.ToInt32(txtNgayVao.EditValue)); spinHuyDatPhong.Properties.MaxValue = Convert.ToDecimal(txtNgayVao.EditValue); }