Question

It gives operation not permitted on IsolatedStorageFileStream error when I try to save the content of the file in the fileStream fs.

var appStorage = IsolatedStorageFile.GetUserStoreForApplication();
string[] fileList = appStorage.GetFileNames();

foreach (string fileName in fileList)
    {
       using (var file = appStorage.OpenFile(fileName, FileMode.Open))
       {
           if (fileName != "__ApplicationSettings")
           {
               var fs = new IsolatedStorageFileStream(fileName, FileMode.Open, FileAccess.Read, appStorage);
               string abc = fs.ToString();
               meTextBlock.Text = abc;
               //MemoryStream ms = appStorage.OpenFile(fileName, FileMode.Open, FileAccess.Read);

               clientUpload.UploadAsync(SkyDriveFolderId, fileName, fs);
          }
     }
}

Answer 1

Why did you add the inner using (var file = appStorage.OpenFile(fileName, FileMode.Open))?

Seems to me the problem is that you’re opening a stream to read the file and then opening another, without closing the previous one!

If you remove that line (seems not to be doing anything there) it should work fine.

Oh, and the fs.ToString() will only get you the Type name, not the file content; to read the file, use a StreamReader with the fs.