asyncawait.cs

var http = new HttpClient ();

// This is sorta node.js like with a 'callback' or continuation after the async operation completes:
http.GetStringAsync ("https://google.com")
  .ContinueWith (t => {
    var html = t.Result;
    Console.WriteLine (html);
  });
  
// This is the same thing:
var html = await http.GetStringAsync ("https://google.com");
Console.WriteLine (html);