字符串有什么区别？ 和 c# 中的字符串

Question

Could you explain what difference between string? and string. When we use ? in values type it means that variable can contains null, but what does it mean for reference type string?

Thanks!

Answer 1

In C#, a String and a string are exactly the same thing. The object String has been encapsulated by the string "data type" for simplicity purposes. Strings, in fact, are not a data type, but an object.

Since a string is an object, it, therefore, is nullable.