Visual Basic 2008 Recipes: A Problem-Solution Approach

5.19. Use an Isolated Store

Problem

You need to store data in a file, but your application does not have the required FileIOPermission for the local hard drive.

Solution

Use the IsolatedStorageFile and IsolatedStorageFileStream classes from the System.IO. IsolatedStorage namespace. These classes allow your application to write data to a file in a user-specific directory without needing permission to access the local hard drive directly.

How It Works

The .NET Framework includes support for isolated storage, which allows you to read and write to a user-specific or machine-specific virtual file system that the common language runtime (CLR) manages. When you create isolated storage files, the data is automatically serialized to a unique location ...