using System;
using System.Linq.Expressions;

namespace X
{
    public class ObjectSet<T>
    {
        public T[] x;
    }

    public static class ObjectContextExtensions
    {

        public static T[] Find<T>(this ObjectSet<T> set, int id, params string[] includes) where T : class
        {
            Console.WriteLine("second");
            return set.x;
        }

        public static T[] Find<T>(this ObjectSet<T> set, int id, params Expression<Func<T, object>>[] includes) where T : class
        {
            Console.WriteLine("first");
            return set.x;
        }

   
    }

    public class Test
    {
        public static void Main()
        {
            new ObjectSet<string>().Find(0);
            Console.ReadKey();
        }
    }
}