C# - Create an Async/Await Main(string[] args)

I apologize in advance. This is more of a codebyte than a How-To guide but I think it's neat.

Updated (6/30/2018)

Main Async has been added in C# 7.1

• Compile in C# 7.1+ (I choose to build in latest minor version now).

Example

using System;
using System.Threading.Tasks;

namespace Demonstration
{
    public static class Program
    {
        static async Task Main(string[] args)
        {
            await Console.Out.WriteLineAsync($"I've turned myself asynchronous, Morty!");
        }
    }
}

This code also cooly demonstrates how to use Console with Async/Await.

Old Way

General Rules

• You can't get rid of static void Main(string[] args).
• You will need to add System.Threading.Tasks as a namespace.
• Main is the startup function.
• Main grabs a secondary function awaiter (called MainAsync) and pauses until MainAsync returns (GetResult()).
• MainAsync - could be called anything - can now perform long running tasks (even in parallel).
• Main is thread blocked the entire time while MainAsync is where you do all your work.
• Main shouldn't have any other lines inside of it since it is thread blocked.

Example

using System;
using System.Threading.Tasks;

namespace DirectoryTestApp
{
    class Program
    {
        static void Main(string[] args)
        {
            MainAsync(args).GetAwaiter().GetResult();
        }

        static async Task MainAsync(string[] args)
        {
            await Console.Out.WriteLineAsync("I've turned myself Asynchronous, Morty!");
            await Console.In.ReadLineAsync();
        }
    }
}

This code also cooly demonstrates how to use Console with Async/Await.