Issue with Receipt Generator Application

Hey everyone,

I'm having issues priming the with the GetPrices function within my receipt generator program. Essentially, I am only able to enter in a single numerical value for the price. I release it's because I have a logic error within my do-while loop, but I'm having trouble converting that logic into a priming loop form.

Ideally, I would like to input a series of numbers, each followed by a bool prompt after each entry asking "Do you want to input another value?" When the entry is finished, the application will generate a receipt that lists subtotal, tax, and the grand total.

Essentially, the logic is as follows:

1. Display price prompt
2. Get price information
3. Display continue prompt
4. Get continue answer
5. Loop to #1 while continue answer is "Y" or "y"

My issue is that I can't figure out how to implement steps 4 and 5 within my program. I would greatly appreciate your help, as I am a complete newbie when it comes to C#.

Thanks in advance!

Code:

---

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;

namespace ProgramName
{
    class Program
    {
        static void Main(string[] args)
        {
            List<double> prices;
            double subtotal;
            double tax;
            double taxValue = 0.09; //the rate of tax to be paid; in this case, 9%

            double total;

            prices = GetPrices(); //capitalize all words in functions; variables start with a lowercase
            subtotal = CalcSubtotal(prices);
            tax = CalcTax(subtotal, taxValue);
            total = Total(subtotal, tax);
            PrintReceipt(prices, subtotal, tax, total);
        }

        static List<double> GetPrices()
        {
            List<double> prices = new List<double>();  //creates an array for us, so all we have to do is add and subtract


            //To Do: Get Prices
            string buffer;
            double price;
            Console.WriteLine("Please enter the price of the item.");
            do
            {
                buffer = Console.ReadLine();

                if (double.TryParse(buffer, out price))
                {
                    prices.Add(price);
                }
                else
                {
                    Console.WriteLine("Incorrect data was input. Please enter the price as a numerical value.");
                    buffer = Console.ReadLine();
                }

              Console.WriteLine("Do you wish to add more items? Please type either Y or N and press the enter key.");
            {
            if (Console.ReadLine("Y" || "y"));  //my latest additions here
            {
            prices.Add(price);
            }

            else if (Console.ReadLine("N" || "n"));
            {
            Console.WriteLine("Processing your receipt.");
            }


            }
            while (buffer == "Y" || buffer == "y");

            return prices;
        }

        static double CalcSubtotal(List<double> prices)

        {
            double subtotal = 0.00;
            foreach (double temp in prices)

            {
                subtotal += temp;
            }
            return subtotal;
            //function that calculates the subtotal by taking
        }


        static double Total (double subtotal, double tax)
        {
        double total = 0.00;

        total=subtotal + tax;
        return total;
        }

        static double CalcTax(double subtotal, double taxValue)

        {
            double tax;
            tax = subtotal * taxValue;
            return tax;

        }

        static void PrintReceipt(List<double> prices, double subtotal, double total, double tax)
        {
            Console.WriteLine("Welcome to our store!");
            {
                foreach (double temp in prices)

                {
                    Console.WriteLine(temp);
                }

            }
            Console.WriteLine("The subtotal is..." + subtotal);
            Console.WriteLine("The amount of tax to be paid is..."+ tax);
            Console.WriteLine("The grand total is..." + total);
            Console.WriteLine("Thank you for shopping with us!");
        }



    }
}

---

Generally, the way I've seen this work is as follows:

1. Display price prompt
2. Get price information
3. If price information is end of data code continue else goto 1
4. Process and print recript

You just have to decide what will be the end of data code to pass when you are finished entering price data.