我的结果看起来像这样：
public static async Task<string> Upload(byte[] image){ using (var client = new HttpClient()) { using (var content = new MultipartFormDataContent("Upload----" + DateTime.Now.ToString(CultureInfo.InvariantCulture))) { content.Add(new StreamContent(new MemoryStream(image)), "bilddatei", "upload.jpg"); using ( var message = await client.PostAsync("http://www.directupload.net/index.php?mode=upload", content)) { var input = await message.Content.ReadAsStringAsync(); return !string.IsNullOrWhiteSpace(input) ? Regex.Match(input, @"http://w*.directupload.net/images/d*/w*.[a-z]{3}").Value : null; } } }}
