关键字

abstract as base bool break byte
case catch char checked class const
continue decimal default delegate do double
else enum ecent explicit extern false
finally fixed float for foreach get
goto if implicit in int interface
internal is lock long namespace new
null object out override partial private
protected public readonly ref return sbyte
sealed set short sizeof stackalloc static
struct switch this throw true try
typeof uint ulong unchecked unsafe ushort
using value virtual volatile volatile void
where while yield

s关键字讲解

用于在兼容的引用类型之间执行转换。

is关键字讲解

检查对象是否与给定类型兼容