Example of sending lots of requests to the server.

AttackTheServer.cs

using System;
using System.Diagnostics;
using System.Threading.Tasks;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace WebRequest
{
    [TestClass]
    public class AttackTheServer
    {
        [TestMethod]
        public void Attack()
        {
            var requestMaster = new RequestMaster("http://www.test.dev");

            int damage = requestMaster.Attack(10);

            Debug.WriteLine("Total hit count = {0}", damage);
        }
    }

    public class RequestMaster
    {
        private readonly string victim;
        private int totalHitCount;

        /// <param name="victim">The URL of the test subject</param>
        public RequestMaster(string victim)
        {
            this.victim = victim;
        }

        /// <summary>
        /// A powerful attack that increases in power with each 'hit'
        /// </summary>
        /// <param name="hitCount">The amount of times to hit the victim</param>
        public int Attack(int hitCount)
        {
            Parallel.For(0, hitCount, (x) =>
                {
                    for (var i = 0; i < x; i++)
                    {
                        var client = new System.Net.WebClient();
                        client.DownloadDataAsync(new Uri(this.victim));

                        totalHitCount++;
                        Debug.WriteLine("Hit number {0}!", this.totalHitCount);
                    }
                });

            return this.totalHitCount;
        }
    }
}