C# http performance test

http_performance_test_concurrent.cs

string baseUrl = "http://localhost";
void Main()
{
	var urls = new string[] { 
		"/url/endpoint",
	};
	
	var concurrentRequests = new int[]{ 1, 5, 25, 50, 100, 500, 1000};
	var numberOfTurns = 10;
	RunTests(urls, concurrentRequests, numberOfTurns);
		
}

private void RunTests(string[] urls, int[] concurrentRequests,  int numberOfTimes = 1)
{
	for(var i = 0; i < numberOfTimes; i++)
	{
		RunFor(urls, concurrentRequests);
	}
}
private void RunFor(string[] urls, int[] concurrentRequests)
{
	concurrentRequests.ToList().ForEach( e =>	
	{
		 RunTest(urls, e);
	}); 
}
private void RunTest(string[] sites, int iterations, string description = "")
{
	var action = GetAction();
	
	var watch = new Stopwatch(); 
   // Construct started tasks
   Task<bool>[] tasks = new Task<bool>[sites.Count()];
   watch.Start();
   
   for(int j = 0; j < iterations; j++)
   {
		for (int i = 0; i < sites.Count(); i++)
		{
			tasks[i] = Task<bool>.Factory.StartNew(action, sites[i]);
		}
   }
   try
   {
       Task.WaitAll(tasks);
   }
   catch (AggregateException e)
   {
       Console.WriteLine("\nThe following exceptions have been thrown by WaitAll()");
       for (int j = 0; j < e.InnerExceptions.Count; j++)
       {
           Console.WriteLine("\n-------------------------------------------------\n{0}", e.InnerExceptions[j].ToString());
       }
   }
   finally
   {
   	watch.Stop();
    Console.WriteLine("\"{0}|{1}|{2}\", ",sites.Count(), iterations, watch.Elapsed.TotalSeconds);
   }
}
private Func<object, bool>  GetAction()
{
	baseUrl = baseUrl.Trim('/');
	return (object obj) =>
   {
		var str = (string)obj;
		var client = new RestClient(baseUrl);
		client.Authenticator = new NtlmAuthenticator();
		var request = new RestRequest(str, Method.GET);
		request.AddHeader("Accept", "text/html");
		var response = client.Execute(request);		
		return (response != null);
   };
}

program_single.cs

string baseUrl = "http://localhost";
string path =  "/some/url";

private HttpClient _client = new HttpClient();
void Main()
{   
	Console.WriteLine("Start {0}", DateTime.Now.TimeOfDay);
	RunAsync().Wait();   
	Console.WriteLine("Stop {0}", DateTime.Now.TimeOfDay);
}
private async Task RunAsync()
{
	var messageHandler = new HttpClientHandler { UseDefaultCredentials = true };
    using (HttpClient client = new HttpClient(messageHandler))
    {
        await RunTimedTest(client, baseUrl + path, "application/json");
        
    }
}
public async Task RunTimedTest(HttpClient _client, string Uri, string mediaHeader)
{
    int iterations = 500;
    _client.DefaultRequestHeaders.Accept.Clear();
    _client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue(mediaHeader));
    var watch = Stopwatch.StartNew();
    for (int i = 0; i < iterations; i++)
    {
        var result = await _client.GetAsync(Uri);
        var value = await result.Content.ReadAsStringAsync();
    }
    Console.WriteLine("Format: {0,-20}\t Time (s):{1,10:ss\\.fff}", mediaHeader, watch.Elapsed);
}