private void btnAddCoffee_Click(object sender, EventArgs e)
        {
            try
            {
                if (!string.IsNullOrWhiteSpace(txtSize.Text))
                {
                    Coffee newCup = new Coffee();

                    if (ValidateSizeText(txtSize.Text))
                    {
                        newCup.Size = newCup.GetSize(txtSize.Text).Value;
                    }

                    if (_order.Coffees.Any())
                    {
                        DialogResult dialogResult = MessageBox.Show("Would you like another coffee to your order? ", "Another Coffee?", MessageBoxButtons.YesNo);
                        if (dialogResult == DialogResult.No)
                        {
                            return;
                        }
                    }

                    _order.Coffees.Add(newCup);
                    AddToCurrentOrderTextbox($"{newCup.Size.ToString()} coffee started");
                }

                if (!string.IsNullOrWhiteSpace(txtCream.Text))
                {
                    Cream cream = new Cream();

                    if (_order.Coffees.Any() && ValidateCondimentQuantity(txtCream.Text))
                    {
                        cream.Quantity = cream.GetQuantity(txtCream.Text);
                        _order.Coffees.Last().Cream = cream;
                        AddToCurrentOrderTextbox($"{cream.Quantity} creamer(s) added");
                    }
                }

                if (!string.IsNullOrWhiteSpace(txtSugar.Text))
                {
                    Sugar sugar = new Sugar();

                    if (_order.Coffees.Any() && ValidateCondimentQuantity(txtSugar.Text))
                    {
                        sugar.Quantity = sugar.GetQuantity(txtSugar.Text);
                        _order.Coffees.Last().Sugar = sugar;
                        AddToCurrentOrderTextbox($"{sugar.Quantity} sugar(s) added");
                    }
                }

                lblOrderTotal.Text = _order?.Total.ToString();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Application Error");
            }

            ClearUI();
        }
        public decimal GetPrice(CoffeeSize size, Cream cream, Sugar sugar)
        {
            decimal price = 0m;

            price += GetBasePrice(size);

            if (cream != null)
            {
                price += cream.Price * cream.Quantity;
            }

            if (sugar != null)
            {
                price += sugar.Price * sugar.Quantity;
            }

            return(price);
        }