.net中的低优先级http上传

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

class Program
{
    static async Task Main(string[] args)
    {
        CancellationTokenSource cts = new CancellationTokenSource();
        CancellationToken token = cts.Token;

        Task uploadTask = UploadFileAsync("http://example.com/upload", token);

        // 主线程中的其他任务
        // ...

        await uploadTask;
    }

    static async Task UploadFileAsync(string url, CancellationToken token)
    {
        HttpClient client = new HttpClient();

        // 准备上传的文件
        // ...

        HttpResponseMessage response = await client.PostAsync(url, content, token);

        // 处理上传结果
        // ...
    }
}