[c#] How to correctly write async method?

So I am trying to learn the basics of using 'async' and 'await' in C#, but I am not sure what I am doing wrong here. I am expecting the following output:

Calling DoDownload DoDownload done [...output here...] 

But I don't get the output of the download, and I also expect "done" but that takes a while. Shouldn't that be output immediately? Also, I can't seem to get the string result either. Here is my code:

namespace AsyncTest {     class Program     {         static void Main(string[] args)         {             Debug.WriteLine("Calling DoDownload");             DoDownloadAsync();             Debug.WriteLine("DoDownload done");         }          private static async void DoDownloadAsync()         {             WebClient w = new WebClient();              string txt = await w.DownloadStringTaskAsync("http://www.google.com/");             Debug.WriteLine(txt);         }     } } 

You are calling DoDownloadAsync() but you don't wait it. So your program going to the next line. But there is another problem, Async methods should return Task or Task<T>, if you return nothing and you want your method will be run asyncronously you should define your method like this:

private static async Task DoDownloadAsync()     {         WebClient w = new WebClient();          string txt = await w.DownloadStringTaskAsync("http://www.google.com/");         Debug.WriteLine(txt);     } 

And in Main method you can't await for DoDownloadAsync, because you can't use await keyword in non-async function, and you can't make Main async. So consider this:

var result = DoDownloadAsync();  Debug.WriteLine("DoDownload done"); result.Wait();