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Partially completed text boxes and tombstoning in Windows Phone 7 -
when use twoway data binding view model on page, have observed, view model updated when focus leaves field (eg. textbox). behaviour matches description in updating data source.
if application tombstoned, examples i've seen persist view model in page state, , reload them if activated again.
from can see, means if user hadn't caused focus lost text box editing, current value isn't copied view model, , isn't saved.
is user (and microsoft's application certification process) expect wp7 application?
saving partially entered text across tombstoning isn't requirement marketplace acceptance testing.
however, should persist data if makes sense in context of application , give best user experience.
do not base application experience on way framework synchronises data view model. what's best user.
if made sense application save information, user, want , woudn't care whatever technical reason gave not doing this.
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