using System;

using System.Threading.Tasks;

​

namespace AsyncMain

{

    public class Program

    {

        public static async Task Main(string[] args)

        {

            var helloWorld = await GetHelloWorldAsync();

            Console.WriteLine(helloWorld);

        }

​

        static Task<string> GetHelloWorldAsync()

        {

            return null;

        }

    }

}