如何使用部分视图列出无限数量的嵌套类别和子类别。(.NET Core5.0)

public class Category
{
    public int CategoryId { get; set; }
    public string Name { get; set; }
    public int? ParentCategoryId { get; set; }
}

public class CategoryViewModel
{
    public int CategoryId { get; set; }
    public string Name { get; set; }
    public List<CategoryViewModel> ChildCategories { get; set; }
}

@model List<CategoryViewModel>

<ul>
    @foreach (var category in Model)
    {
        <li>
            @category.Name
            @if (category.ChildCategories != null && category.ChildCategories.Count > 0)
            {
                @Html.Partial("_CategoryPartial", category.ChildCategories)
            }
        </li>
    }
</ul>

public class CategoryController : Controller
{
    private readonly ApplicationDbContext _context;

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

    public IActionResult Index()
    {
        var categories = _context.Categories.ToList();
        var categoryViewModels = BuildCategoryViewModels(categories, null);
        return View(categoryViewModels);
    }

    private List<CategoryViewModel> BuildCategoryViewModels(List<Category> categories, int? parentCategoryId)
    {
        var categoryViewModels = new List<CategoryViewModel>();
        var childCategories = categories.Where(c => c.ParentCategoryId == parentCategoryId).ToList();

        foreach (var category in childCategories)
        {
            var categoryViewModel = new CategoryViewModel
            {
                CategoryId = category.CategoryId,
                Name = category.Name
            };

            categoryViewModel.ChildCategories = BuildCategoryViewModels(categories, category.CategoryId);
            categoryViewModels.Add(categoryViewModel);
        }

        return categoryViewModels;
    }
}

@model List<CategoryViewModel>

<h1>Categories</h1>

@Html.Partial("_CategoryPartial", Model)