windows phone 7 - Programmatically close ListPicker from WP7 Silverlight Toolkit -

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my app being rejected marketplace because of requirement 5.2.4.c (back button must close menu or dialog , cancel navigation). i'm using listpicker silverlight toolkit , that's what's causing failure: pressing button when listpicker open goes instead of closing listpicker , cancelling navigation.

this seems simple enough fix: if user presses button , listpicker open, close , cancel navigation. however, haven't seen way of programatically either detecting whether listpicker open, or closing listpicker.

am missing something? how fix bug?

one again, have asked question soon. answer here: http://silverlight.codeplex.com/workitem/7643


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