Create Round Button with Border IN UWP Windows 10 C#

Question

I am trying to create a round button, with a White Border and a Transparent Background (as the old AppBarButtons in Windows 8.1) in UWP Windows 10.

I have found several

Answer 1

I don't know if the OP is still interested in rounded corner buttons, but for sake of completeness I think it may be helpful for other users to point out, as the user peterincumbria said, that for the lastest build of Windows 10 (1809) there is a new property in the class Control: CornerRadius. So now the following code is enough:

Put this inside a Grid and we have a rounded corner button in the middle of the Page.