using System;
using System.Threading;
using System.Threading.Tasks;

namespace AsyncAwaitConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            // What are Async and Await ( .NET 4.5 Interview question with answers)?
            // https://www.youtube.com/watch?v=V2sMXJnDEjM
            // Async Await are markers showing where the control resumes after the task or thread completes

            Method(); // only method will wait for the LongTask to complete
            Console.WriteLine("Main thread"); // the main thread is executed
            Console.ReadLine();
        }

        public static async void Method() // You have to use async if you use await
        {
            await Task.Run(new Action(LongTask)); // invoces LongTask in paralel mode
            // but what we want is actully to execute the next line only when LongTask is finished.
            Console.WriteLine("New Thread"); // Wait until the long task finishes 
        }

        public static void LongTask()
        {
            Thread.Sleep(20000);
        }
    }
}

/*
 Main thread
New Thread
dasd
     */