我可以使用EF6代码优先映射映射受保护的ICollection吗？

Given the class:

鉴于课程:

public class User
{
    public int Id { get; protected set; }
    protected virtual ICollection<Role> UserRoles { get; set; }

    public IEnumerable<Role> Roles
    {
        get { return new ReadOnlyCollection<Role>(UserRoles.ToArray()); }
    }
}
public class User
{