在C#中如何用一行代码将string转换为int?

Question

在C#中如何用一行代码将字符串转换为可空整型（Nullable<int>，int?）？How to write one line code to parse a string into a nullabe int in C#?

Answer 1

int temp;
int? val = Int32.TryParse(parseStr, out temp) ? temp : (int?)null;