using System;

using System.Linq;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    private static Random rand = new Random();

    public static void Main()

    {

        int timeout = rand.Next(10, 20);

        Console.WriteLine("Timeout is: {0}", timeout);

        //1st approach

        DateTime start = DateTime.Now;

        Task<string> task1 = Program.SomeAsyncMethod(timeout);

        task1.Wait();

        string result = task1.Result;

        DateTime end = DateTime.Now;

        Console.WriteLine("It took {0} ms to complete", (end - start).TotalMilliseconds);

        //2nd approach

        start = DateTime.Now;

        result = Program.SomeAsyncMethod(timeout).Result;

        end = DateTime.Now;

        Console.WriteLine("It took {0} ms to complete", (end - start).TotalMilliseconds);       

    }

    private static async Task<string> SomeAsyncMethod(int i)

    {

        string result = String.Empty;

        var task  = Task.Run(() => {

            Thread.Sleep(i);

            return "So long expected string!!!";

        });

        await task;

        return result;

    }

}