本章的主要是对C#的基础知识进行简要介绍。其中包括.NET Framework、Common Language Runtime以及C#的特点等。另外，本章还介绍了Visual Studio 2005的安装及使用，MSDN的安装及使用，命名空间的基本概念。本章的最后还给出了两个简单的实例，分别介绍了控制台应用程序和Windows窗体应用程序的编写。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001638s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.102245s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002108s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001824s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.006785s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004789s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001142s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004857s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.031860s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002347s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 475935 [ RunTime:0.017772s ]
