用C#做了个在线更新的程序，通常安装时可以使用，断点续传时出错

用C#做了个在线更新的程序，正常安装时可以使用，断点续传时出错
用C#做了个在线更新的程序，正常安装时可以正常更新软件，
但是断点续传时出错  提示无法显示错误消息，原因是无法找到包含此错误消息的可选资源程序集
在wince下双击该程序，提示该程序不是正常的WINCE程序 
代码如下:


                Application.DoEvents();
                float percent = 0;
                long totalBytes = 0;
                try
                {
                    utils.writelogs("start");
                    HttpWebRequest Myrq = (HttpWebRequest)HttpWebRequest.Create(ServerURL);
                    HttpWebResponse myrp = (HttpWebResponse)Myrq.GetResponse();
                     totalBytes = myrp.ContentLength;
                     utils.writelogs(totalBytes.ToString());
                    if (prog != null)
                    {
                        prog.Maximum = (int)totalBytes;
                    }
                    string sPath = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase.ToString());
                     long totalDownloadedByte=0;

                     long lStartPos = 0;
                     System.IO.FileStream fs; 
                    Stream st = myrp.GetResponseStream();

                    if (File.Exists(sPath + "\\updatefile.CAB"))
                    {

                        fs = new FileStream(sPath + "\\updatefile.CAB", FileMode.Open, FileAccess.ReadWrite);//File.OpenWrite(StrFileName);
                        lStartPos = fs.Length;
                        fs.Seek(lStartPos, SeekOrigin.Current); //移动文件流中的当前指针

                        //fs = System.IO.File.OpenWrite(sPath + "\\updatefile.CAB");
                        //lStartPos = fs.Length;
                        //fs.Seek(lStartPos, System.IO.SeekOrigin.Current); //移动文件流中的当前指针 

                        // so = new FileStream(sPath + "\\updatefile.CAB", FileMode.Append);
                        //totalDownloadedByte = so.Length;

                        utils.writelogs("断点续传从该地址开始:" + lStartPos.ToString());
                    }else{
                        fs = new FileStream(sPath + "\\updatefile.CAB", FileMode.Create);
                    //long totalDownloadedByte = 0;
                        lStartPos = 0; 


                    //int osize1 = so.Read(by, 0, (int)by.Length);
                    
                    }
                    utils.writelogs("istartpos:" + lStartPos);
                    byte[] by = new byte[1024*200];
                    int osize = st.Read(by, 0, (int)by.Length);
                    utils.writelogs("osize"+osize.ToString());
                    while (osize > 0)
                    {
                        lStartPos = osize + lStartPos;
                        //System.Windows.Forms.Application.DoEvents();
                        fs.Write(by, 0, osize);

                        if (prog != null)
                        {
                            prog.Value = (int)lStartPos;
                        }
                        osize = st.Read(by, 0, (int)by.Length);
                        percent = (float)lStartPos / (float)totalBytes * 100;
                        int m = percent.ToString().IndexOf(".");
                        if (m > 0)
                        {
                            this.label1.Text = "当前下载进度" + percent.ToString().Substring(0, m) + "%";
                        }
                        else
                        {
                            this.label1.Text = "当前下载进度100%";
                        }
                        System.Windows.Forms.Application.DoEvents(); //必须加注这句代码，否则label1将因为循环执行太快而来不及显示信息
                        //Thread.Sleep(200);
                    }
                    fs.Close();
                    st.Close();
                     string sPath9 = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase.ToString());
                     utils.writelogs(sPath9 + "\\updatefile.CAB");
                     utils.writelogs(sPath9 + "\\updatefile.CAB.cab");

                     //File.Move(sPath9 + "\\updatefile.CAB", sPath9 + "\\updatefile.CAB.cab");
                     utils.writelogs("写入成功");
                }
                catch (System.Exception ex)
                {
                    utils.writelogs(ex.Message);
                }
[解决办法]
Wince平台与Windos平台还是有区别的。有些写法不支持。请仔细确认