❔ How to make categories correctly?

public class Category
{
    public int Id { get; set; }

    public Thread Thread { get; set; } = null!;
    public Guid ThreadId { get; set; }
    public int Sorting { get; set; } = 0;
    public string Name { get; set; } = string.Empty;
    public ICollection<CategoryDetail> Details { get; set; } = null!;
    public ICollection<Category> Subcategories { get; set; } = new List<Category>();
    public int? CategoryId { get; set; }
}

public class CategoryDetail
{
    public int Id { get; set; }
    public Category Category { get; set; } = null!;
    public int CategoryId { get; set; }

    public string Culture { get; set; } = string.Empty;
    public string Title { get; set; } = string.Empty;
    public string Description { get; set; } = string.Empty;
}