如何使用C#中的键对NameValueCollection进行排序？

using System;
using System.Collections.Specialized;
using System.Linq;

class Program
{
    static void Main()
    {
        NameValueCollection nvc = new NameValueCollection();
        nvc.Add("key1", "value1");
        nvc.Add("key2", "value2");
        nvc.Add("key3", "value3");

        var sortedNvc = nvc.Cast<string>()
            .OrderBy(key => key)
            .ToDictionary(key => key, key => nvc[key]);

        foreach (var keyValuePair in sortedNvc)
        {
            Console.WriteLine("Key: {0}, Value: {1}", keyValuePair.Key, keyValuePair.Value);
        }
    }
}