声明: 前面都是语言很基础的废话, 可直接跳到后面查看内容
官方文档的总结:Value Types and Reference Types
https://docs.microsoft.com/en-us/dotnet/visual-basic/programming-guide/language-features/data-types/value-types-and-reference-types
.Net下数据类型分为三大类︰
Value Type (值类型)︰常见的型别是struct、int.