可为空的

• C syntax simplifies many of the complexities of c while providing powerful features such as nullable value types , enumerations , delegates , anonymous methods and direct memory access , which are not found in java
  C #语法简化了c + +的诸多复杂性，同时提供了很多强大的功能，例如可为空的值类型、枚举、委托、匿名方法和直接内存访问，这些都是java所不具备的。