title: Operation not permitted on IsolatedStorageFileStream in WP7
body: <p>Im trying to get Images from URL and store it within my isolated storage, and then get the images from the isolated storage
  here is my relevant code:</p>
  
  <pre><code>public void GetImages()
  {
      string uri = "http://sherutnetphpapi.cloudapp.net/mini_logos/" + path;
      WebClient m_webClient = new WebClient();
      imageUri = new Uri(uri);   
      m_webClient.OpenReadAsync(imageUri);
      m_webClient.OpenReadCompleted += new OpenReadCompletedEventHandler(webClient_ImageOpenReadCompleted);
      m_webClient.AllowReadStreamBuffering = true;  
  }
  
  void webClient_ImageOpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
  {
      string iso_path = "~/SherutApp1;component/" + path;
      var isolatedfile = IsolatedStorageFile.GetUserStoreForApplication();
      using (IsolatedStorageFileStream stream = new IsolatedStorageFileStream(iso_path, FileMode.Create, isolatedfile))                                                                    
      {
  
          byte[] buffer = new byte[e.Result.Length];
          while (e.Result.Read(buffer, 0, buffer.Length) &gt; 0)
          {
              stream.Write(buffer, 0, buffer.Length);
          }
      }
  }
  </code></pre>
  
  <p>i get the exception at the headline on this line:</p>
  
  <pre><code>using (IsolatedStorageFileStream stream = new IsolatedStorageFileStream(iso_path, FileMode.Create, isolatedfile))
  </code></pre>
  
  <p>I don't know what is the problem, although i think that maybe  images does not inserted correctly to the isolated storage.</p>