A reference type that encapsulates data constants and fields and behavior methods , properties , indexers , events , operators , instance constructors , static constructors , and destructors , and can contain nested types 一種引用類型,它封裝數(shù)據(jù)和行為,并可以包含嵌套類型,其中數(shù)據(jù)包括常數(shù)和字段,行為包括方法、屬性、索引器、事件、運(yùn)算符、實(shí)例構(gòu)造函數(shù)、靜態(tài)構(gòu)造函數(shù)和析構(gòu)函數(shù)。