Hi Zee_patel,
Take a look at Button styles and templates, you could modify the VisualState Pressed section to style the button.
<VisualState x:Name="Pressed">
...
</VisualState>
Hope this helps.
--James
<THE CONTENT IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS OR IMPLIED>
Thanks
MSDN Community Support
Please remember to "Mark as Answer" the responses that resolved your issue. It is a common way to recognize those who have helped you, and makes it easier for other visitors to find the resolution later.