Changing the viewport of a listbox in WPF

One of the nice thing about the WPF controls is the ability for them to mimic almost anything….In my case I wanted to recreate an old Winform sample of a NASDAQ sales status board…Which required a grid to draw different colors, show new items being added – but do it with out scrollbars…Turns out the WPF Listbox does all this with no or very little code at all – in most cases just a little mark up