Entity Framework auto generate primary key
<p>I'm new to Entity Framework. I have a simple class:</p>

<pre><code> public class User
{
    [System.ComponentModel.DataAnnotations.Schema.DatabaseGenerated(System.ComponentModel.DataAnnotations.Schema.DatabaseGeneratedOption.Identity)]
    public int UserId { get; set; }
    public string Email { get; set; }
    public string UserName { get; set; }
    public string Password { get; set; }

    //public UserList Users { get; set; }

    public User() { }
    public User(int userId, string email, string username)
    {
        UserId = userId;
        Email = email;
        UserName = username;
    }
}
</code></pre>

<p>And my Initializer class:</p>

<pre><code>public class UserDataInitializer : DropCreateDatabaseAlways&lt;UserDataContext&gt;
{
    protected override void Seed(UserDataContext context)
    {
        var Users = new List&lt;User&gt; {

            new User() {UserId=1, Email="a1@gmail.com", UserName="a1", Password="123456"},
            new User() {UserId=2, Email="a2@gmail.com", UserName="a2", Password="123456"},
            new User() {UserId=3, Email="a3@gmail.com", UserName="a3", Password="123456"},
            new User() {UserId=4, Email="a4@gmail.com", UserName="a4", Password="123456"}}


        Users.ForEach(i =&gt; context.Users.Add(i));
        context.SaveChanges();


    }
}
</code></pre>

<p>Suppose, i want add new User with UserId=100. It will auto change UserId to 5.</p>

<p><strong>How i can disable this modification of EF?</strong> 'UserId' must be primary key and it's type is int.</p>