When adding data items or data collections to your app, the item/collection may be configured to be persistent or temporary.

Temporary data will only be stored in memory as long as the application is running and will be permanently lost when the application is closed.

Persistent data will be saved in a database and will be kept even if you close your app.

We recommend you put all of your persistent data inside the MasterPage page and only use temporary data for temporary data items or collections in your other pages.