WP7 IsolatedStorageFileStream Error “Operation not permitted on IsolatedStorageFileStream”

Question

I'm trying to open a txt file that's saved as content in my app, however I run into the error shown in the thread's title. Here's the line of code giving me trouble:
var readStream = new IsolatedStorageFileStream(mapFileName, FileMode.Open, store);

which is used when a the method
map.loadMap(string mapFileName)
is called.

Any help would be greatly appreciated.

EDIT

I've created a new method to read in the text file using an IsolatedStorageFile and IsolatedFileStream however I'm completely clueless on how I would go about reading in the data to a 2D int array, using my old parsing code and a screenshot of my map01.txt for reference could anyone suggest a way of going about this as I have not found any relevant documentation on-line:

        int x = 0, y = 0;
        var store = IsolatedStorageFile.GetUserStoreForApplication();
        var readStream = new IsolatedStorageFileStream(mapFileName, FileMode.Open, store);
        var stream = new StreamReader(readStream);

        do
        {
            string line = stream.ReadLine();
            string[] numbers = line.Split(',');

            foreach (string e in numbers)
            {
                int tile = int.Parse(e);
                this.tileID[x,y] = tile;

                x++;
            }
            y++;
        }
        while (!stream.EndOfStream);`  

Thanks!

Answer 1

You don't use IsolatedStorage for project files, they are for files that are stored in the cache/appdata, you actually read them like a normal file.

Go to: http://msdn.microsoft.com/en-us/library/bb199073.aspx

To learn how to open/read/save files.