Skib can't read comments properly.

using System;

namespace EulerProblem1
{
    class Program
    {
        static void Main(string[] args)
            //Solves problem 1 of Project Euler, easily found by doing a Google search for it.
            //This is my first actual attempt at commenting my code. Cheers. -Yanlin
        {
            bool retry = true;
            while (retry == true)
                //A later function sets retry as false and breaks the loop if the user specifies he does not wish to run the program again.
            {
                ulong mult1 = 0;
                //The first multiple to check
                ulong mult2 = 0;
                //The second multiple to check.
                ulong limit = 0;
                //The upper limit for the multiples' results. IE: limit of 10 for multiple of 3 makes 9 the biggest possible.
                ulong total = 0;
                //Sum of both multiples, up to the limit.
                Console.Clear();
                Console.WriteLine("Yanlin's Project Euler Problem 1 solver. V1.2.2");
                string name1 = "multiple";
                //Hardcoded string for user input function
                string name2 = "limit";
                //Hardcoded string for user input function
                mult1 = userinput(mult1, name1);
                //New function for user input, coded in V1.2.
                mult2 = userinput(mult2, name1);
                //New function for user input, coded in V1.2.
                limit = userinput(limit, name2);
                //New function for user input, coded in V1.2.
                total = Problem(mult1, mult2, limit, total);
                //New function for actually calculating the solution. Coded in V1.2.2
                Console.Clear();
                Console.Write("\n\n\nThe sum of the multiples of:\n{0} and {1}\n\nto a limit of:\n{2}\n\nis:\n", mult1, mult2, limit);
                Console.WriteLine(total);
                retry = close(retry);
            }
            Console.Clear();
            Console.WriteLine("\n\n\n\n\nThank you for using:\nYanlin's Project Euler Problem 1 solver. V1.2.2\n\nPress any key to close the program.");
            Console.ReadKey();
        }
        //Room for functions here:
        static ulong Problem(ulong mult1, ulong mult2, ulong limit, ulong total)
            // Used to calculate the two multiples. Coded in V1.2.2
            //0 acts as a "none"
            // If identical numbers are set as mults, both will be calculated as if they are different, resulting in a "double" result. Intended operation.
        {
            ulong number1 = 0;
            ulong number2 = 0;
            ulong track1 = 0;
            ulong track2 = 0;

            while (track1 < limit && mult1 != 0)
            {
                number1 += mult1;
                track1 += number1;
            }
            if (number1 == limit)
                track1 -= number1;

            while (track2 < limit && mult2 != 0)
            {
                number2 += mult2;
                track2 += number2;
            }
            if (number2 == limit)
                track2 -= number2;
            total = track1 + track2;
            return total;

        }
        static bool close(bool retry)
            //Closes the program or allows for a reset. Coded in V1.2.2
            //Works as long as the main loop uses a bool to check if to run again.
        {

            char YN = 'A'; //Would be even easier to code as a string, with the ability to use .ToLower
            while (YN != 'Y')
            {
                Console.WriteLine("\nWould you like to restart the program? Y/N");
                while (true)
                {
                    try
                    {
                        YN = char.Parse(Console.ReadLine());
                        break;
                    }
                    catch
                    {
                        Console.WriteLine("Only Y or N are valid inputs");
                    }
                }
                if (YN == 'y' || YN == 'Y')
                    YN = 'Y';
                else if (YN == 'N' || YN == 'n')
                    YN = 'N';
                else
                    Console.WriteLine("Only Y or N are valid inputs");
                if (YN == 'N')
                    return false;
            }
            return true;
        }
        static ulong userinput (ulong input1, string input2)
            //Used as a replacement to doing this code three times. Coded in V1.2.2
            //Takes the user input and a hardcoded string to display what the user is inputting currently.
        {
            while (true)
                {
                    Console.WriteLine("\nInput first {0}:", input2);
                    try
                    {
                        input1 = ulong.Parse(Console.ReadLine());
                        return input1;
                    }
                    catch
                    {
                        Console.WriteLine("Only natural numbers (Positive integers) are valid inputs");
                    }
                }

        }
    }
}