如何在ASP.NET MVC中创建递归结构

public class Category
{
    public int CategoryId { get; set; }
    public string Name { get; set; }
    public int? ParentCategoryId { get; set; }
    public virtual Category ParentCategory { get; set; }
    public virtual ICollection<Category> ChildCategories { get; set; }
}

public class ApplicationDbContext : DbContext
{
    public DbSet<Category> Categories { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Category>()
            .HasOptional(c => c.ParentCategory)
            .WithMany(c => c.ChildCategories)
            .HasForeignKey(c => c.ParentCategoryId);
    }
}

public class CategoryController : Controller
{
    private readonly ApplicationDbContext _context;

    public CategoryController(ApplicationDbContext context)
    {
        _context = context;
    }

    public ActionResult Index()
    {
        var categories = _context.Categories.ToList();
        return View(categories);
    }
}

@model List<Category>

<ul>
    @foreach (var category in Model)
    {
        <li>
            @category.Name
            @if (category.ChildCategories.Any())
            {
                <ul>
                    @Html.Partial("_RecursiveCategory", category.ChildCategories.ToList())
                </ul>
            }
        </li>
    }
</ul>

@model List<Category>

@foreach (var category in Model)
{
    <li>
        @category.Name
        @if (category.ChildCategories.Any())
        {
            <ul>
                @Html.Partial("_RecursiveCategory", category.ChildCategories.ToList())
            </ul>
        }
    </li>
}