gistfile1.cs

using System;
using System.Collections.Generic;
using System.Data.Services;
using System.Data.Services.Common;
using System.Linq;

namespace TestSingly
{
    public class SinglyServices : DataService<SinglyContext>
    {
        public static void InitializeService(DataServiceConfiguration config)
        {
            config.SetEntitySetAccessRule("FacebookFriends", EntitySetRights.All);
            config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V3;

        }

        protected override SinglyContext CreateDataSource()
        {
            return new SinglyContext();
        }
    }

    public class SinglyContext
    {
        public IQueryable<FacebookFriend> FacebookFriends
        {
            get
            {
                return new[]{ new FacebookFriend("Tito"),
                    new FacebookFriend("Pepe"),
                    new FacebookFriend("Juanjo")}.AsQueryable();
            }
        }
    }

    [DataServiceKey("Name")]
    public class FacebookFriend
    {

        public FacebookFriend() { }
        public FacebookFriend(string name)
        {
            Name = name;
        }

        public string Name { get; set; }
    }
}