No, I don't think so. It's creating a property of type Nester that won't really exist until you run it. All the compiler does is verify that Nester is defined.

>

public class Program
>    {
>        static void Main(string[] args)
>        {
>            Nester n = new Nester();
>        }
>    }
>
>    public class Nester
>    {
>        public Nester nested = new Nester();
>    }