windows store apps - XAML code review -

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i totally new 8.1 store app in visual studio. can 1 me below code means comes default grid app template store app 8.1

<grid.childrentransitions>             <transitioncollection>                 <entrancethemetransition/>             </transitioncollection>         </grid.childrentransitions>

its nothing animation transition applied children of grid when appear on screen. can explore here.


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