说明：  sqlite数据库是轻量级的数据库，非常实用，免安装，极其方便。本类库包含了C#对sqlite数据库的各种基本操作，如创建、删除数据库，对数据库内容的增删查改等等。整个程序简单易用。
(SQLite database is a lightweight database, very practical, free of installation, very convenient. This class library contains all kinds of basic operations of C# on SQLite database, such as creating and deleting database, deleting and changing database contents, etc.. The whole program is easy to use.)