async method - synchronous part

proof

  private static void Main()
  {
      Console.WriteLine("before start");
      var task = InfiniteAsync();
      Console.WriteLine("after start");
      Task.WhenAll(task).Wait();
      Console.WriteLine("after whenAll");
  }

  private static async Task InfiniteAsync()
  {
      while (true) ;
      await Task.Delay(1);
  }
  
The output:
> before start