GenerateRandomPairsAndWriteInFile.cs

using System;
using System.Diagnostics;
using System.IO;
using System.Security.Cryptography;

namespace Bench
{
    class Program
    {
        private static readonly Random random = new Random();
        static void Main(string[] args)
        {
            //int result = 0;

            var sw = new Stopwatch();
            sw.Start();

            /*for (int i = 1000000000; i != 0; i--)
            {
                result++;
            }
            Console.WriteLine("Value: {0} Took: {1}s", result, sw.ElapsedMilliseconds / 1000F);*/

         

            for (int steps = 0; steps < 1000000000; ++steps)
            {
                GenerateRandomsPair();
            }
            Console.WriteLine("Took: {0}s", sw.Elapsed / 1000F);
            
        }

        private static void GenerateSecureRandomPair()
        {
            using (RNGCryptoServiceProvider rg = new RNGCryptoServiceProvider())
            {
                byte[] rno = new byte[4];
                byte[] rno1 = new byte[4];
                rg.GetBytes(rno);
                rg.GetBytes(rno1);
                int randomvalue = Math.Abs(BitConverter.ToInt32(rno, 0));
                int randomvalue1 = Math.Abs(BitConverter.ToInt32(rno1, 0));
                //Console.WriteLine("{0}     {1}",randomvalue, randomvalue1);
                WriteInFile(randomvalue, randomvalue1);
            }            
        }

        private static void GenerateRandomsPair()
        {
            lock (random)
            {
                WriteInFile(random.Next(0, Int32.MaxValue), random.Next(0, Int32.MaxValue));
            }
        }

        private async static void WriteInFile(int nb1, int nb2)
        {
            using (StreamWriter outputFile = new StreamWriter("WriteTextAsync.txt", append: true))
            {
                await outputFile.WriteAsync(nb1 + "\t" + nb2 + "\t" + (float)nb1 / (float)nb2);
            }
        }
    }
}