<source lang = "xml">
<!-- UBIKCustomView .xamlx -->
<ContentView...
xmlns:controls="clr-namespace:UBIK.CPL.Controls;assembly=UBIK.CPL">
</ContentView>
<!-- Container where UBIKCustomView is placed , e.g. UBIKChildArea.xamlx -->
<ContentView...
xmlns:controls="clr-namespace:UBIK.CPL.Controls;assembly=UBIK.CPL">