The problem of copying the photos displayed in pictuerbox

Question

Hello
I have a problem I need to solve them .. This program copies the image to a specific folder and open the copied image and displays it in pictuerBox then if we want to replace Previous image in new have the same name, they do not copy and shows an error in the program and a message appears (can not complete the process because the image is used by Other process) what is the solution to this problem??
Program in Annexes