本章将描述 C# 语言的基本特征。尽管后面的章节会更为详尽，有时甚至逻辑缜密地对规则和例外情况进行描述，但本章的描述力求简洁明了，因而难免会牺牲完整性。这样做是为了向读者提供关于该语言的概貌，一方面使读者能尽快上手编写程序，另一方面为阅读后续章节提供指导。-This chapter will describe the C# The basic characteristics of language. Although the back of the chapter will be more detailed, and sometimes even the logic of thought to the rules and exceptions to describe, but try to be brief descr iption of this chapter to understand, which will inevitably sacrifice the integrity. This is to readers in order to provide information on the language of the profile, on the one hand so that readers can start programming as soon as possible, on the other hand to provide guidance to read the follow-up chapters.