Windows Phone 7 : FileStream exception

Question

I try to use FileStream (using namespace System.IO) but I get an exception :

Attempt to access the method failed 

Here is the code :

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Answer 1

On WindowsPhone you must use IsolatedStorage - see this tutorial for example - http://3water.wordpress.com/2010/08/07/isolated-storage-on-wp7-ii/

Read:

    using (var store = IsolatedStorageFile.GetUserStoreForApplication())
    using (var readStream = new IsolatedStorageFileStream(fileName, FileMode.Open, store))
    using (var reader = new StreamReader(readStream))
    {
        return reader.ReadToEnd();
    }

Write:

    using (var store = IsolatedStorageFile.GetUserStoreForApplication())
    using (var writeStream = new IsolatedStorageFileStream(fileName, FileMode.Create, store))
    using (var writer = new StreamWriter(writeStream))
    {
        writer.Write(content);
    }