Here is the MD for Async Main https://github.com/dotnet/csharplang/blob/master/proposals/csharp-7.1/async-main.md
The problem is, you want to code for it now, so that you don’t have a pain to update lots of code later. The solution is add it now, sorta.
public class Program
{
public static void Main(string[] args) => _main(args).Wait();
public static async Task _main(string[] args)
{
// Your code here.
}
}
See that? Just have your main code call _main, which _main is the async code. Then you can do a search and replace to clean all that up as needed later, when you switch to C# 7.1 and have Async Main in your C# toolset. 🙂
Brian By Experience 