private void btn_OrderAdd_Click(object sender, EventArgs e)
{
Customer customer = new Customer
{
CustomerID = txt_CustomerID.Text,
};
customerDal.AddOrder(customer, order: new Order {
OrderDate = DateTime.Now, ShipCity = txt_ShipCity.Text, ShipCountry = txt_ShipCountry.Text
});
MessageBox.Show(customer.CustomerID + " İD li Müşteriye Sipariş Eklendi ");
}