windows phone使用sharpcompress进行解压压缩文件

        public async void DownloadAndUnCompress()
        {
            string strUrl = "http://qd.baidupcs.com/file/3ebe6e988584733fba61c04e9568bc73?fid=3860865449-250528-923682234289515&time=1401003314&sign=FDTAXER-DCb740ccc5511e5e8fedcff06b081203-sDvdhrr7p1EWhMUFNOaYlQbwLmE%3D&to=qb&fm=Q,B,U,nc&newver=1&expires=1401003914&rt=sh&r=347257022&logid=3996325361&sh=1&vuk=3860865449&fn=SharpCompress0.10.3.zip";

            await Task.Run(() =>
             {
                 WebClient wc = new WebClient();
                 wc.OpenReadAsync(new Uri(strUrl, UriKind.Absolute));
                 wc.DownloadProgressChanged += (s, dpce) =>
                 {
                     System.Diagnostics.Debug.WriteLine("已下载" + dpce.ProgressPercentage + "%");
                 };

                 wc.OpenReadCompleted += (s, orce) =>
                 {
                     if (orce.Error != null)
                     {
                         System.Diagnostics.Debug.WriteLine("下载出错");
                         return;
                     }

                     using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
                     {
                         var zipArchive = ArchiveFactory.Open(orce.Result);//创建一个解压器
                         foreach (var entry in zipArchive.Entries)//提取里面每个实体，包括文件夹都算实体
                         {
                             //如果为文件夹先把文件夹创建出来
                             if (entry.IsDirectory)
                             {
                                 if (!storage.DirectoryExists(entry.FilePath))
                                 {
                                     storage.CreateDirectory(entry.FilePath);
                                 }
                                 continue;
                             }
                             //entry.FilePath  为文件的全路径
                             using (IsolatedStorageFileStream isofilestream = storage.CreateFile(entry.FilePath))
                             {
                                 //写入到独立存储空间中
                                 entry.WriteTo(isofilestream);
                             }
                         }
                         zipArchive.Dispose();
                         System.Diagnostics.Debug.WriteLine("解压完成");
                     }
                 };
             });
        }