Thanks for your thoughts.
I tried the CurrentCulture setting, ignoring whatever the OS is set to.

People using the software will not encounter numbers. We only use these data internally to convert coordinates to GDI+ of specific size/dimensions etc.
So, basically, it doesn't matter where you use the software, there will always be commas, because the party that provdes the raw data uses commas.

I will try if the current culture setting fixes the glitch.

Though as far as i have seen, you can set the current culture of the UIThread. what about the other Threads that i create that work with all those numbers? They are not the UIThread, will they still abide by the new setting?

Tahnk you. Smiley