private void btnCustomerAdd_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("Müşteri Eklensin mi?", "Müşteri Ekleniyor...", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {
                Customer customer = new Customer
                {
                    CustomerName     = tbxCustomerAddAd.Text,
                    CustomerLastname = tbxCustomerAddSoyad.Text,
                    City             = tbxCustomerAddCountry.Text,
                    Country          = tbxCustomerAddCountry.Text,
                    Adress           = tbxCustomerAddAdres.Text,
                    Phone            = tbxCustomerAddTel.Text
                };

                _customerDal.CustomerAdd(customer);
            }
        }