You are creating a Windows application using .NET Framework 4.0. The application is used to browse all the way through the sales orders.
A file on the local computer is used to store the sales order data. A Web service is used by the application to synchronize sales order data with the central database.
You notice that other applications on the computer can access the sales order data.
Therefore, you are required to ensure that the sales order data can be accessed only by the Windows application.
Which of the following actions will you take?
A. Use the IsolatedStorageFile class to store the sales order data.
B. Use the IsolatedStorageFileStream class to store the sales order data.
C. Use the PrincipalPermission class to read the sales order data.
D. Use the RijndaelManaged class to encrypt the sales order data.
