You are creating a Windows Web service client application by using the .NET Framework 3.5.
The user settings between application executions have to be maintained. The application will be executed
without administrative privileges.
You need to ensure that the application meets the requirements by using minimum amount of
development effort.
What should you do?

A.
Use App.config to store session state.

B.
Maintain the session state in a class variable.

C.
Create a Windows service to store session state.

D.
Use System.Net.CookieContainer to store session state.