如何从httpResponseMessage中将zipfile作为StreamContent读取？

using System;
using System.IO;
using System.Net.Http;
using System.Threading.Tasks;

public class Program
{
    public static async Task Main()
    {
        using (HttpClient client = new HttpClient())
        {
            HttpResponseMessage response = await client.GetAsync("http://example.com/zipfile.zip");

            if (response.IsSuccessStatusCode && response.Content.Headers.ContentType.MediaType == "application/zip")
            {
                using (Stream zipStream = await response.Content.ReadAsStreamAsync())
                {
                    using (MemoryStream memoryStream = new MemoryStream())
                    {
                        await zipStream.CopyToAsync(memoryStream);
                        memoryStream.Seek(0, SeekOrigin.Begin);

                        using (StreamContent streamContent = new StreamContent(memoryStream))
                        {
                            // 设置Content-Type头部
                            streamContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/zip");

                            // 发送请求
                            HttpResponseMessage postResponse = await client.PostAsync("http://example.com/upload", streamContent);

                            if (postResponse.IsSuccessStatusCode)
                            {
                                Console.WriteLine("Zip file uploaded successfully.");
                            }
                            else
                            {
                                Console.WriteLine("Failed to upload zip file.");
                            }
                        }
                    }
                }
            }
            else
            {
                Console.WriteLine("Invalid response or content type is not zip.");
            }
        }
    }
}