.NET: IsolStorageException

Question

I am building a Windows Phone 7 application in Silverlight. I'm having difficulty with IsolatedStorage.

        IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication();
        if (!storage.FileExists(STORIES_FILE))
        {
            storage.CreateFile(STORIES_FILE);
        }

        string contents;

        // fails here
        using (IsolatedStorageFileStream stream = storage.OpenFile(STORIES_FILE, FileMode.Open))
        {
            using (StreamReader reader = new StreamReader(stream))
            {
                contents = reader.ReadToEnd();
            }
        }

The exception is:

"Operation not permitted on IsolatedStorageFileStream."
System.Exception {System.IO.IsolatedStorage.IsolatedStorageException}

What can i do wrong? MSDN says this exception is thrown when isolated storage is deleted or disconnected. Has this really happened? I am having this problem on an emulator.

Update . This only happens when you first run the application on the emulator. After the application crashes, I run it again on the emulator, and this problem does not occur.

Update 2 : using FileMode.OpenOrCreateinstead FileMode.Openseems to fix the problem.

Answer 1

, :

using (IsolatedStorageFileStream stream = storage.OpenFile(STORIES_FILE, FileMode.OpenOrCreate))
        {
            using (StreamReader reader = new StreamReader(stream))
            {
                contents = reader.ReadToEnd();
            }
        }