Xamarin TabbedPage Issue

Hello everyone!
am having a major issue with xamarin tabbed page
There is one tabbed page in my xamarin project called TodayTabbedPage so by default in android, Tabs will be shown at the top side so I write following code in tabbed page XAML file to place them at bottom
xmlns:android="clr-namespace:Xamarin.Forms.PlatformConfiguration.AndroidSpecific;assembly=Xamarin.Forms.Core"
android:TabbedPage.ToolbarPlacement="Bottom"
android:TabbedPage.BarItemColor="#262626"
android:TabbedPage.BarSelectedItemColor="#9900CC"
So It perfectly showing all tabs at the bottom
But whenever am calling another tabbed page instead of TodayTabbedPage the bottom tab line still shows
Hope this information is enough please help!!!