title: Operation not permitted on IsolatedStorageFileStream. error
body: <p>I have a problem with isolated storage.</p>
  
  <p>This is my code:</p>
  
  <pre><code>List&lt;Notes&gt; data = new List&lt;Notes&gt;();
  
  using (IsolatedStorageFile isoStore = 
           IsolatedStorageFile.GetUserStoreForApplication())
  {
    using (IsolatedStorageFileStream isoStream = 
             isoStore.OpenFile("Notes.xml", FileMode.OpenOrCreate))
    {
      XmlSerializer serializer = new XmlSerializer(typeof(List&lt;Notes&gt;));
      data = (List&lt;Notes&gt;)serializer.Deserialize(isoStream);              
    }
  }
  
  data.Add(new Notes() { Note = "hai", DT = "Friday" });
  
  return data;
  </code></pre>
  
  <p>the mistake : Operation not permitted on IsolatedStorageFileStream. in</p>
  
  <pre><code>using (IsolatedStorageFileStream isoStream = 
          isoStore.OpenFile("Notes.xml", FileMode.OpenOrCreate))
  </code></pre>