问怎样才能更快地上传文件？

EN

static string CreateDownloadLink(string File)
{
    string ReturnValue = string.Empty;
    try
    {
        using (WebClient Client = new WebClient())
        {
            byte[] Response = Client.UploadFile("https://anonfile.com/api/upload", File);
            string ResponseBody = Encoding.ASCII.GetString(Response);
            if (ResponseBody.Contains("\"error\": {"))
            {
                ReturnValue += "There was a erorr while uploading the file.\r\n";
                ReturnValue += "Error message: " + ResponseBody.Split('"')[7] + "\r\n";
            }
            else
            {
                ReturnValue += "Download link: " + ResponseBody.Split('"')[15] + "\r\n";
                ReturnValue += "File name: " + ResponseBody.Split('"')[25] + "\r\n";
            }
        }
    }
    catch (Exception Exception)
    {
        ReturnValue += "Exception Message:\r\n" + Exception.Message + "\r\n";
    }
    return ReturnValue;
}