private void GetQuoteButton_Click(object sender, EventArgs e)
        {
            Desk desk = new Desk
            {
                Width           = (int)widthNumericUpDown.Value,
                Depth           = (int)depthNumericUpDown.Value,
                NumberOfDrawers = (int)numberOfDrawersNumericUpDown.Value,
                SurfaceMaterial = (Desk.DesktopSurfaceMaterial)surfaceMaterialSelectionComboBox.SelectedItem
            };

            DeskQuote deskQuote = new DeskQuote
            {
                Desk          = desk,
                CustomerName  = customerNameTextBox.Text,
                ShippingSpeed = GetRushShippingChoice(),
                QuoteDate     = DateTime.Now
            };

            totalPriceAmountLabel.Text = $@"${deskQuote.CalculateQuote()}";
            shippingPriceLabel.Text    = $@"${deskQuote.GetShippingPrice()}";

            WriteQuoteToFile(deskQuote);

            DisplayQuote();
        }
        private void GetQuoteButton_Click(object sender, EventArgs e)
        {
            try
            {
                Desk desk = new Desk
                {
                    Width           = (int)widthNumericUpDown.Value,
                    Depth           = (int)depthNumericUpDown.Value,
                    NumberOfDrawers = (int)numberOfDrawersNumericUpDown.Value,
                    SurfaceMaterial = (Desk.DesktopSurfaceMaterial)surfaceMaterialSelectionComboBox.SelectedItem
                };

                DeskQuote deskQuote = new DeskQuote
                {
                    Desk          = desk,
                    CustomerName  = customerNameTextBox.Text,
                    ShippingSpeed = GetRushShippingChoice(),
                    QuoteDate     = DateTime.Now
                };

                if (string.IsNullOrEmpty(deskQuote.CustomerName))
                {
                    throw new InvalidOperationException(@"Please enter your name.");
                }

                totalPriceAmountLabel.Text = $@"${deskQuote.CalculateQuote()}";
                shippingPriceLabel.Text    = $@"${deskQuote.GetShippingPrice()}";

                string quotesFile = @"quotes.txt";
                if (!File.Exists(quotesFile))
                {
                    using (StreamWriter writer = File.CreateText(quotesFile))
                    {
                        writer.WriteLine(
                            $"{deskQuote.QuoteDate}," +
                            $"{deskQuote.CustomerName}," +
                            $"{deskQuote.Desk.Width}," +
                            $"{deskQuote.Desk.Depth}," +
                            $"{deskQuote.Desk.NumberOfDrawers}," +
                            $"{deskQuote.Desk.SurfaceMaterial}," +
                            $"{deskQuote.ShippingSpeed}," +
                            $"{deskQuote.GetShippingPrice()}," +
                            $"{deskQuote.CalculateQuote()}");
                        writer.Close();
                    }
                }
                else
                {
                    using (StreamWriter writer = File.AppendText(quotesFile))
                    {
                        writer.WriteLine(
                            $"{deskQuote.QuoteDate}," +
                            $"{deskQuote.CustomerName}," +
                            $"{deskQuote.Desk.Width}," +
                            $"{deskQuote.Desk.Depth}," +
                            $"{deskQuote.Desk.NumberOfDrawers}," +
                            $"{deskQuote.Desk.SurfaceMaterial}," +
                            $"{deskQuote.ShippingSpeed}," +
                            $"{deskQuote.GetShippingPrice()}," +
                            $"{deskQuote.CalculateQuote()}");
                        writer.Close();
                    }
                }

                DisplayQuote();
            }
            catch (Exception exception)
            {
                MessageBox.Show(exception.Message);
            }
        }