I have prepared a small video demonstrating how to modify the button theme to show a border only at the bottom. Basically you need to:
- Remove the currently applied repository for the desired state
- Create your own repository with BorderBoxStyle = FourBorders, and the width of all borders but the bottom one should be 0
- Apply this repository
- Remove the Shape from the main element (as FourBorders does not work with shapes)
I hope that you find this useful.
Check out Telerik Analytics, the service which allows developers to discover app usage patterns, analyze user data, log exceptions, solve problems and profile application performance at run time. Watch the videos and start improving your app based on facts, not hunches.