windows phone 7 - Align TextBlock inside a ListBoxItem -

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i'm developing windows phone 7 application.

i want center vertically textblock inside listboxitem. here xaml code:

<listboxitem x:name="singlegameitem" height="79" margin="10,5">     <textblock horizontalalignment="center" height="31" margin="5" textwrapping="wrap" text="textblock" verticalalignment="center" width="431" textalignment="center"/> </listboxitem>

how can that?

the solution is:

<listbox x:name="options" margin="12,8,8,8" grid.row="1">     <listboxitem x:name="singlegameitem" height="79" margin="10,5" verticalalignment="center">         <textblock horizontalalignment="center" height="31" margin="5" textwrapping="wrap" text="textblock" verticalalignment="center" width="431" textalignment="center"/>     </listboxitem> </listbox>

sorry.


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