Please read more about what “first chance exception” means, here:
First chance exception messages most often do not mean there is a problem in the code. For applications / components which handle exceptions gracefully, first chance exception messages let the developer know that an exceptional situation was encountered and was handled.
You should only see them whilst running attached to visual studio. If a “first chance exception” causes the program to pause you can either press F5 to continue execution or configure visual studio to ignore them.
If the above is not helpful please post back.