C# animated GIF stops playing during loop

Hi,

I have an animated GIF that is supposed to display whilst a long loop executes (the loop is a Monte-Carlo simulation that lasts around 10 seconds). When I click a button I show a picture box with an animated GIF, whilst the simulation runs.

Unfortunately, when I click the button, the animated GIF stops playing whilst the simulation runs and only starts animating again when the simulation stops!!

Does anyone know of a way to make the animated GIF display whilst the simulation is in progress?

Thanks.