silverlight用webclient大文件上传的实例代码

客户端： 代码如下:     /// <summary>      /// 写入数据到流中      /// </summary>      /// <param name=”url”></param>      /// <param name=”callback”></param>      public async static Task<bool> Write(string url, Stream clientStream)      {          if (clientStream.Length > 25*1024*1024)              url += “&t=1”