public static void SomeMethod()

    {

        Console.Write("\nWrite H/h to guess Heads, T/t to guess Tails, or Q/q to quit =>  ");

        char userChoice;

        int numWins = 0;

        int numPlays = 0;

        double percentWin = 0d;

        while ((userChoice = Convert.ToChar(Console.ReadLine())).ToString().ToLower() != "q")

        {

            numPlays++;

​

            int compChoice = new Random().Next(2);

​

            if (userChoice == 'H' || userChoice == 'h')

            {

                if (compChoice == 0)

                {

                    Console.WriteLine("\nYOU WON");

                    numWins++;

                }

                else

                {

                    Console.WriteLine("\nYOU LOSE");

                }

                continue;

            }

            if (userChoice == 'T' || userChoice == 't')

            {

                if (compChoice == 1)

                {

                    Console.WriteLine("\nYOU WON");

                    numWins++;

                }

                else

                {

                    Console.WriteLine("\nYOU LOSE");

                }

                continue;

            }                        

        }

​

        if (numPlays != 0)

        {

            percentWin = (double)numWins / numPlays;

        }

        Console.WriteLine("\nYou won {0} out of {1} game(s) or {2:P} of the games played.", numWins, numPlays, percentWin);

​