Catalan Number

/*
 * Write a program to calculate the Nth Catalan number by given N.
 *
 *  3 methods included
*/

using System;
using System.Diagnostics;
using System.Numerics;

class CatalanNumber
{
    static void Main()
    {
        while (true)
        {
            Stopwatch stopWatch = new Stopwatch();
            BigInteger numberN = InputData();

            stopWatch.Start();

            // FASTEST
            // for N = 100000 , runtime: 00:00:12.90
            BigInteger catalanNumberN = 1;
            BigInteger result = 0;
            for (int i = 1; i <= numberN; i++)
            {
                catalanNumberN = (2 * ((2 * i) - 1)) * catalanNumberN / (i + 1);
            }


            //MEDIUM SPEED
            // for N = 100000 , runtime: 00:01:52.81
            //BigInteger divident = CalculateFactorial(2 * numberN);
            //BigInteger nFactorial = CalculateFactorial(numberN);
            //BigInteger nFactorialPlus1 = nFactorial * (numberN + 1);
            //BigInteger divider = nFactorial * nFactorialPlus1;
            //BigInteger catalanNumberN = divident / divider;

            // SLOWEST METHOD
            //for N = 100000 , runtime: 00:02:09.23
            //BigInteger catalanNumberN = CalculateFactorial(2 * numberN) / (CalculateFactorial(numberN + 1) * CalculateFactorial(numberN));

            stopWatch.Stop();
            Console.WriteLine("The {0} Catalan number is {1}" + Environment.NewLine, numberN, catalanNumberN);

            TimeSpan ts = stopWatch.Elapsed;
            string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}", ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10);
            Console.WriteLine("runtime: " + elapsedTime + Environment.NewLine);
        }
    }

    static BigInteger InputData()
    {
        BigInteger numberN;
        string invalidInput = "Please enter a valid number greater than or equal to 0!" + Environment.NewLine;
        Console.WriteLine("Enter a value for N: ");
        while (!(BigInteger.TryParse(Console.ReadLine(), out numberN) && numberN >= 0))
        {
            Console.WriteLine(invalidInput);
            Console.WriteLine("Enter a value for N: ");
        }
        return numberN;
    }

    static BigInteger CalculateFactorial(BigInteger numberN)
    {
        BigInteger factorial = 1;
        for (BigInteger i = 1; i <= numberN; i++)
        {
            factorial = factorial * i;
        }
        return factorial;
    }
}