DbDatabase.DefaultConnectionFactory = new SqlCeConnectionFactory("System.Data.SqlServerCe.4.0");

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

namespace Proto
{
    using System.Data;
    using System.Data.Entity;
    using System.Data.Entity.Database;
    using System.Data.SqlServerCe;
    using System.ComponentModel.DataAnnotations;

    class Program
    {
        static void Main(string[] args)
        {
            DbDatabase.DefaultConnectionFactory = new SqlCeConnectionFactory("System.Data.SqlServerCe.4.0");
            DbDatabase.SetInitializer(new DropCreateDatabaseIfModelChanges<ProtoCatalog>());

            using (var db = new ProtoCatalog())
            {
                var user = new User
                {
                    Name = "bob",
                    Password = "123",
                    Creation = DateTime.Now,
                    PrimaryEmailAddress = "bob@example.com"
                };

                db.Users.Add(user);

                db.SaveChanges();

                Console.ReadKey();
            }
       }
    }

    public class ProtoCatalog : DbContext
    {
        public DbSet<User> Users { get; set; }
    }

    public class User
    {
        [Key, StringLength(50)]
        public string Name { get; set; }

        [Required, StringLength(100)]
        public string Password { get; set; }

        [Required, StringLength(320)]
        public string PrimaryEmailAddress { get; set; }

        [StringLength(320)]
        public string SecondaryEmailAddress { get; set; }

        [Required]
        public DateTime Creation { get; set; }

        public bool Active { get; set; }
    }
}

install-package EFCodeFirst.SqlServerCompact
install-package EFCodeFirst.Sample