宁静致远

摘要： A class library is a good way to encapsulate a common set of logic so it can be shared among multiple application. This is useful both to promote reusability of the classes in the library and to keep the portions of an application down to a manageable size. An interface is an abstraction of an abstraction, and should be familiar to programmers of COM or its UNIX ancestor, the distributed computing environment(DCE). While a class encapsulates a data structure and its operations, an interfa 阅读全文