using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using MongoDB.Bson;
using MongoDB.Driver;
using MongoDB.Driver.Linq;

namespace TestCSharp526
{
    public interface IC
    {
        int X { get; set; }
    }

    public class C : IC
    {
        public int Id { get; set; }
        public int X { get; set; }
    }

    public static class Program
    {
        public static void Main(string[] _args)
        {
            try
            {
                var server = MongoServer.Create("mongodb://localhost/?safe=true");
                var database = server.GetDatabase("test");
                var collection = database.GetCollection<IC>("csharp526");

                if (collection.Count() == 0)
                {
                    collection.Insert(new C { Id = 1, X = 1 });
                }

                var ic = collection.AsQueryable<IC>().FirstOrDefault(i => i.X == 1);
                Console.WriteLine(ic.ToJson());
            }
            catch (Exception ex)
            {
                Console.WriteLine("Unhandled exception:");
                Console.WriteLine(ex);
            }

            Console.WriteLine("Press Enter to continue");
            Console.ReadLine();
        }
    }
}