private void btnSave_Click(object sender, EventArgs e)
        {
            customer.CustomerId   = Convert.ToInt32(txtCustomerId.Text);
            customer.CustomerName = txtname.Text;
            customer.MobileNo     = txtMobile.Text;
            customer.Address      = txtaddress.Text;
            customer.CreditLimit  = Convert.ToDouble(txtCreditLimit.Text);
            BunifuFlatButton btnsave = (BunifuFlatButton)sender;

            customer.cmd = btnsave.Text;
            string msgText = customer.insertCustomer(customer);

            MessageBox.Show(msgText, "Success Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
            clearForm();
        }