I started to do it today, and I would like to quickly solve this month's course, and strive to complete all things this month. Now the problem is that the ceremonial opening report is written in accordance with the previous session, which is ready to use the previous program, but that program is turned over, so there is no more comment, and I can't run normally, and I have a classmate. Didn't read that process. I must find a way to make my opening report and classmates, I have already done it first. The classmates have not changed the system, but also have no experience in writing .NET program, no matter how, I will do it first. Let's talk about it again.