During this time, I have been studying .NET, but I haven't quiet. Take a look, that look, the result is a semi-solving, know a little bit, but you can write a handwritten program but find yourself nothing. Waste a lot of time. Now how to do it later: Thought: 1, you must be intimate, sink; 2, don't have a distortion; action: 1, don't be greedy, the same learning; As soon as fully understand, you can't know the half solution; 3, don't just learn theory, all things must be practiced; 4, don't do some things;