private void bnAdd_Click(object sender, EventArgs e)
 {
     try
     {
         frmIns_Services afrmAddService = new frmIns_Services(this);
         afrmAddService.ShowDialog();
     }
     catch (Exception ex)
     {
         MessageBox.Show("frmLst_Services.bnAdd_Click\n" + ex.ToString(), "Lỗi", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
 }
 // Kết thúc
 private void btnAddService_Click(object sender, EventArgs e)
 {
     frmIns_Services afrmIns_Services = new frmIns_Services(this);
     afrmIns_Services.ShowDialog();
 }
 private void btnAddNew_Click(object sender, EventArgs e)
 {
     this.IsDataChange = true;
     frmIns_Services afrmIns_Services = new frmIns_Services(this);
     afrmIns_Services.ShowDialog();
 }