private void CreateOrder_button_Click(object sender, EventArgs e)
        {
            //var val = this.CustomerComboBox.SelectedText;
            //var valu = this.EmployeeToFixComboBox.SelectedText;
            var orderInfo = new Order
            {
                CustomerId      = int.Parse((this.CustomerComboBox.SelectedItem as ComboboxItem).Value.ToString()),
                EmployeeId      = int.Parse((this.EmployeeToFixComboBox.SelectedItem as ComboboxItem).Value.ToString()),
                AppointmentDate = AppointmentDateTimePicker.Value,
                IssueWithCar    = IssuesWithCarTextBox.Text,
                OrderDetails    = OrderDetailsTextBox.Text
            };

            OrdersHelper.InsertOrderInfo(orderInfo);
            ClearForm();
            MessageLabel.Show();
            //some validation needed
        }