Difficulty in understanding class Property declaration

Question

I was going through a class library in one of our projects.

i came across statements like public int? variablename

What does this mean..I am going to create classes for new application refering current

application .

So ,i would like to know what it is and in which scenarios we can use and is it not

possible to avoid it

That is a nullable type http://msdn.microsoft.com/en-us/library/1t3y8s4s(v=vs.80).aspx — Stephen Gilboy, Jul 31 '13 at 15:25
@Stephen: I'm not sure that doesn't count as a complete answer. I'd have certainly upvoted it if it had been... — Chris, Jul 31 '13 at 15:26
@Chris, thanks I'll toss it in the mix and see what happens. — Stephen Gilboy, Jul 31 '13 at 15:28
I am confused about using ? in the property declaration..i have not used it before..in which scenarios we are required to use it..and is it not possible to avoid it — Sai Avinash, Jul 31 '13 at 15:31

score 2 · Answer 1 · edited May 23 '17 at 11:56

2

int? means that it is "nullable". Being nullable allows you to have null values in your int.

Check out this link if you need to understand a bit more,

edited May 23 '17 at 11:56

Community

answered Jul 31 '13 at 15:28

trueamerican420

score 1 · Answer 2 · answered Jul 31 '13 at 15:27

1

The question mark is a shortcut for Nullable<> (MSDN).

int? is the same as Nullable<int>

answered Jul 31 '13 at 15:27

nvoigt

score 1 · Answer 3 · answered Jul 31 '13 at 15:27

1

answered Jul 31 '13 at 15:27

Stephen Gilboy

score 0 · Answer 4 · answered Jul 31 '13 at 15:26

0

This means that the variable is nullable

answered Jul 31 '13 at 15:26

Ctrl_Alt_Defeat

4 Answers4