A ghost !!!!!!!!

Debug today ProgramWhen I suddenly jumped out, I said that the active defense asked me XX things do not need to be executed, XianRen ah, my hand is fast, point into a rejection, this is good, IDE closed. Close it. When I open the preparation program again, I am dizzy. Where is the program I just modified ???? All are gone. I have been saving the disk all the time. Why ???????

All files are returned to the previous status !!!!! When you get angry, you no longer need to take the initiative to defend against a bird ~