@huangxiaofei: If you drag a tab out of the Document Well, it will be in its own window. You can then maximize the window by double clicking and restore it by double clicking. But this doesn't work on the tab itself.
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@Joabe Tavares: Check in the OnLaunched method in the App.xaml.cs file. If there is a call to ResetData, comment it out. ResetData populates the tables the first time you run the app. But if you leave it in there, it will do this every time.
@Podster: There are some people who have updated the open source Microsoft Sync Framework to work with SQLite on Windows 8. That would be a good place to start. Two good examples are:
@job mwaniki: You can find the sample at http://code.msdn.microsoft.com/Using-SQLite-in-a-Windows-c16aea77.
Let me know if you have any questions or comments.
@mokh: I don't have examples of modern lob apps for those two. I used those to illustrate what traditional desktop line of business apps look like. A Windows Store line of business app is simply a lob app that adheres to the design guidelines.