说明：  这是一个C#的基础培训文档，包括介绍C#的Word文档，以及一个简单的PPT，可用于向初学者讲解C#的基本特性。
(This is a C# based training documents, including the introduction of C# Word document, as well as a simple PPT, can be used to explain to beginners the basic features of C#.)