Windows 8 Metro style listbox

Question

I'm building a wpf metro style application, but for the start, page I needed to create Windows 8 start screen like listbox in windows 7 and .NetFramework 4.0.

I used Listbox and Wrappanel now, but as you see it's not clear!!!

Please help me to fill the blank cell.

EDIT change place of buttons

Answer 1

look at : http://www.codeproject.com/Articles/370650/Simple-Metro-Style-Panorama-Control-for-WPF by Sacha Barber