find the potential bug

gistfile1.cs

public static class Foo
{
  private static async Task DelayAsync()
  {
    await Task.Delay(1000);
  }
  
  public static void Test()
  {
    var delayTask = DelayAsync();
    delayTask.Wait();
  }
}

Nailed it, @juanplopes!

By the way, got the example from here: http://msdn.microsoft.com/en-us/magazine/jj991977.aspx