Ch2, lesson 4 - Working with Isolated Storage

• Bad idea to give pgs unfettered access to a computer. THE SANDBOX OF LIMITED SECURITY.
• Q) Where do pgs that need to persist state go?
• A) Isolated Storage (IS). Now pgs can run as least-priveleged users + persist state without having to test whether app has enough rights to save data to the hard drive.
• Main benefit of isolated storage - app will run regardless of whether runing under partial, limited or full-trust.

How to Create a Store

• Before saving to isolated storage, one must determine how to scope the data in the store:
• mthd 1 - Assembly/Machine - creates a store that is specific to the calling assembly & lcl machine. Useful for application-level data.
• mthd 2 - Assembly/User - creates a store that is specific to the calling assembly & current user. Useful for user-level data.
• create assembly/machine store - IsolatedStorageFile machineStore = IsolatedStorageFile.GetMachineStoreForAssembly(); This IS is specific to the assembly that is calling it.

IsolateStorageFileStream

• encapsulates stream to read, write and create files in IS.

R/W

• r/w -> IS like r/w any other data into the file system.
• 1. Create a Store - IsolatedStorageFile userStore = IsolatedStorageFile.GetUserStoreForAssembly();
• 2. Create a Stream - IsolatedStorageFileStream userStream = new IsolatedStorageFileStream("UserSettings.set", FileMode.Create, userStore);