using System;

using System.Threading.Tasks;

​

public class Program

{

    public static async void Main()

    {

        var results = new int[3];

        var tasks = new[] {

            Task.Factory.StartNew(() => results[0] = GetSomething1()), 

            Task.Factory.StartNew(() => results[1] = GetSomething2()), 

            Task.Factory.StartNew(() => results[2] = GetSomething3())

        };

        await Task.WhenAll(tasks);

        Console.WriteLine(results[0]);

        Console.WriteLine(results[1]);

        Console.WriteLine(results[2]);

    }

​

    public static int GetSomething1() { return 1; }

    public static int GetSomething2() { return 22; }

    public static int GetSomething3() { return 333; }

}