接口类似于类,它可以包含方法、属性、事件和索引器,但是接口中只有成员的声明,接口本身不提供对它所声明的成员的实现。例如,在接口中只有方法的声明,而没有定义方法体,这一点与抽象类中的抽象方法类似。
一个接口定义一个协定,实现某接口的类或结构须遵守该接口定义的协定。例如,某个接口定义了两个方法,则要实现该接口的类必须定义这两个方法的实现,即编写它们的方法体。
例:
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接口类似于类,它可以包含方法、属性、事件和索引器,但是接口中只有成员的声明,接口本身不提供对它所声明的成员的实现。例如,在接口中只有方法的声明,而没有定义方法体,这一点与抽象类中的抽象方法类似。
一个接口定义一个协定,实现某接口的类或结构须遵守该接口定义的协定。例如,某个接口定义了两个方法,则要实现该接口的类必须定义这两个方法的实现,即编写它们的方法体。
例: