public class User
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Email { get; set; }
    public bool IsActive { get; set; }
    public DateTime CreatedAt { get; set; }
    public List<Post> Posts { get; set; }
}

public class Post
{
    public int Id { get; set; }
    public string Title { get; set; }
    public string Content { get; set; }
    public int AuthorId { get; set; }
    public DateTime PublishedAt { get; set; }
    public User Author { get; set; }
}