There were a couple of issues in the TitleBar buttons :
They were not visible in Dark theme, moreover hovering over them, the button's went white.
Reduces redundancy in TitleBar button styles
WPF Gallery was not appearing correctly in Windows 10, due to some issues in the latest WPF code, added a workaround for that by checking if Backdrop is supported on the machine. ( Thanks @harshit7962 for bringing this up )
Description
There were a couple of issues in the TitleBar buttons :
Microsoft Reviewers: Open in CodeFlow