In a few different WPF apps that I have been making recently I have noticed that when I have a window of my WPF app open and running, even if the window is doing absolutely nothing, the CPU usage for that process is around 40 - 60 % which seems incredibly high for an idle window...
I know that if my machine doesnt have a GPU then a lot of the graphical processing burden gets passed to the CPU but when nothing is even moving or happening on the window then surely there is not that much to process?

Note that it doesnt happen with all WPF windows, just the bigger ones that have bound lists etc on them.

Any ideas why this might be happening or how I can prevent it?