The stand-alone store is a partition located on the hard disk. Make sure that other applications cannot view your files.
Using system.io.IsolatedStorage;
IsolatedStorageFile isoStore = isolatedStorageFile.GetStore (isolatedStorageScope.assembly | isolatedStorageScope.user, null, null;
String fn = isostore.getFileNames ("a.txt");
IF (fn == null)
{
StreamWriter SW = New Streamwriter (IsolatedStorageFileStream ("a.txt"), filemode.createNew, isostore;
SW.WRITE ("Hello");
}
Else
{
StreamReader SR = IsolatedStorageFileStream ("a.txt"), FileMode.Open, isostore;
String s = sr.readline ();
}