如何使用Cosmos DB中的IQueryable按多列排序？

using Microsoft.Azure.Cosmos;
using System;
using System.Linq;

public class Item
{
    public string id { get; set; }
    public string category { get; set; }
    public string name { get; set; }
    public decimal price { get; set; }
}

public class Program
{
    private static CosmosClient client;
    private static Database database;
    private static Container container;

    public static async Task Main(string[] args)
    {
        string endpoint = "<your-endpoint>";
        string key = "<your-key>";
        string databaseName = "<your-database-name>";
        string containerName = "<your-container-name>";

        client = new CosmosClient(endpoint, key);
        database = client.GetDatabase(databaseName);
        container = database.GetContainer(containerName);

        var query = container.GetItemLinqQueryable<Item>()
            .OrderBy(item => item.category)
            .ThenBy(item => item.price);

        FeedIterator<Item> results = query.ToFeedIterator();

        while (results.HasMoreResults)
        {
            foreach (var item in await results.ReadNextAsync())
            {
                Console.WriteLine($"{item.name} - {item.category} - {item.price}");
            }
        }
    }
}