Task.Result property Waits and blocks

HelloAsync\Program.cs

using System;
using System.Threading.Tasks;

namespace HelloAsync
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Main: line 10"); 
            Console.WriteLine("Main: line 11. Result = " + DoSomethingAsync().Result);
            Console.WriteLine("Main: line 12");

            while( !Console.KeyAvailable)
            {
                System.Threading.Thread.Sleep(1);
            }
        }

        static private async Task<bool> DoSomethingAsync()
        {
            Console.WriteLine("DoSomethingAsync line 22");
            System.Threading.Thread.Sleep(1000);
            Console.WriteLine("DoSomethingAsync line 24");
            return true;
        }
    }
}

/*
Output:
============================
Main: line 10
DoSomethingAsync line 22
DoSomethingAsync line 24
Main: line 11. Result = True
Main: line 12
*/