Pin 0

Hi,
I've been playing around with my arduino and i think i fried pin 0. When I connected pin 0 to my simple circuit arduino just turned it self off.
And since i will use the rx & tx pin for further projects im just wondering if i can test if it is fried. Although it seems to work fine.
Sorry for my bad english.
Thanks.

Generally don't use pins 0 and 1 these are the serial communication lines.

Can you still upload a sketch, if yes then the pin is not fried.