using System;

using System.Threading;

using System.Diagnostics;

public class Program

{

    public static int NetworkOperation1()

    {

        Thread.Sleep(1000); // network IO

        return 42;

    }

    public static int NetworkOperation2()

    {

        Thread.Sleep(1000); // network IO

        return 21;

    }

    public static void Main()

    {

        var watch = new Stopwatch();

        watch.Start();

        Console.WriteLine("Starting Tasks...");

        int result1 = NetworkOperation1();

        int result2 = NetworkOperation2();

        Console.WriteLine("Results {0} {1}...", result1, result2);

        watch.Stop();

        Console.WriteLine($"Execution Time: {watch.ElapsedMilliseconds} ms");

    }

}

​