using System;

using System.Diagnostics;

public class Program

{

    const int MAX_ITERATIONS = 10000000;

    const int MAX_SIZE = 1000;

    public static void Main()

    {

            var timer = new Stopwatch();

​

            Random rand = new Random();

            long InRange = 0;

            long OutOfRange = 0;

​

            timer.Start();

            for ( int i = 0; i < MAX_ITERATIONS; i++ ) {

                var x = rand.Next( MAX_SIZE * 2 ) - MAX_SIZE;

                if ( x < 0 || x > MAX_SIZE ) {

                    OutOfRange++;

                } else {

                    InRange++;

                }

            }

            timer.Stop();

​

            Console.WriteLine( "Comparision 1: " + InRange + "/" + OutOfRange + ", elapsed: " + timer.ElapsedMilliseconds + "ms" );

​

​

            rand = new Random();

            InRange = 0;

            OutOfRange = 0;

​

            timer.Reset();

            timer.Start();

            for ( int i = 0; i < MAX_ITERATIONS; i++ ) {

                var x = rand.Next( MAX_SIZE * 2 ) - MAX_SIZE;

                if ( (uint) x > (uint) MAX_SIZE ) {

                    OutOfRange++;

                } else {

                    InRange++;

                }

            }

            timer.Stop();

            Console.WriteLine( "Comparision 2: " + InRange + "/" + OutOfRange + ", elapsed: " + timer.ElapsedMilliseconds + "ms" );

​

    }

}