Dapper是一个轻量级的ORM工具:ORM框架的核心思想是对象关系映射，ORM是将表与表之间的操作，映射成对象和对象之间的操作，就是通过操作实体类来达到操作表的目的。从数据库提取的数据会自动按你设置的映射要求封装成特定的对象。之后你就可以通过对对象进行操作来修改数据库中的数据。这时候你面对的不是信息的碎片，而是一个形象鲜明的对象。(Dapper is a lightweight ORM tool: the core idea of the ORM fr a mework is the object relation mapping, and ORM is the operation between the table and the table, the operation between the object and the object, and the purpose of achieving the operating table by operating the entity class. Data extracted from database automatically encapsulates specific objects according to your mapping requirements. After that, you can modify data in database by manipulate objects. At this time, you are not facing the fragmented information, but a vivid object.)