通过HTTP Post-Efficiency上传文件

通过http post将文件上传到服务器的最有效方法是什么?

我正在使用WebClient和线程:

public static void Uploadfile(string file_path, string SERVER_URL)
    {
        string filename = file_path;//Asign a value anyway in case of error.
        try
        {
                filename = Path.GetFileName(file_path);

                //Parameter for pass the name of the file
                NameValueCollection parameters= new NameValueCollection();
                parameters.Add("file", filename);
                WebClient client = new WebClient();
                //PUT Request
                client.QueryString = parameters;
                byte[] rawResponse = client.UploadFile(SERVER_URL, "POST", file_path);
                Console.WriteLine(filename + " Uploaded!");
                client.Dispose();
        }
        catch (Exception err)
        {
            Console.WriteLine(filename + " NOT uploaded: " + err.Message);
        }
    }

我在线程中这样调用函数:

for(xxx)
    tasks.Add(Task.Run(() => Uploadfile(file_path, SERVER_URL)));

我为每个文件都打开一个实例,是不是很糟糕?WebClient是最有效的? 你有什么建议吗?