Working with local database in background agent

[vunder]

I'm creating an application which is using local database. From a moment I need to use background agent which is need to access to database too.

First question: how can I reduce memory use while working with database. Now it is about 7Mb, but agents has limitation to a 6Mb. Can I declare a new class from DataContext, is which declared not all tables, which are declared in main application?

Also, I have another problem.
To work with database I added several links to files to agent's project. When I compiling project I'm getting many warning message like this:
Warning 312 The type 'MoneyWallet.Helpers.TileUpdater' in 'D:\Work\WP7\MoneyWallet\MoneyWallet\Helpers\TileUpdater.cs' conflicts with the imported type 'MoneyWallet.Helpers.TileUpdater' in 'd:\Work\WP7\MoneyWallet\MoneyWalletAgent\Bin\Debug\MoneyWalletAgent.dll'. Using the type defined in 'D:\Work\WP7\MoneyWallet\MoneyWallet\Helpers\TileUpdater.cs'. D:\Work\WP7\MoneyWallet\MoneyWallet\ViewModel\ScheduledTransactionsViewModel.cs 189 21 MoneyWallet

Second question: how can I remove this warning and is it critical to application at all?