显然可空＆LT; INT＆GT; 和 INT 在价值相等的。有什么理由选择一个比其他？

 可空＆LT; INT＆GT;一个=无效;
诠释？ B =零;
A == B： // 这是真的
 

解决方案

没有区别。

INT 只是简写可空＆LT; INT＆GT; ，这本身就是速记可空＆LT;的Int32＆GT;

编译code将完全哪一个您选择使用相同的。

Apparently Nullable<int> and int? are equivalent in value. Are there any reasons to choose one over the other?

Nullable<int> a = null;
int? b = null;
a == b; // this is true

No difference.

int? is just shorthand for Nullable<int>, which itself is shorthand for Nullable<Int32>.

Compiled code will be exactly the same whichever one you choose to use.