What is operator "?."?

Question

I have been in a conference and speaker's example has '?.' operator. What is it?

Similar code:

var result = man?.Name;

already this question is answered at SO.please make a research before asking a question — Tharif, May 19 '15 at 11:23
This is indeed not valid, it might be, You typoed it or someone else. Look for this: https://msdn.microsoft.com/en-us/library/1t3y8s4s.aspx - damn, C#6 ? Ok, will remember that. — icbytes, May 19 '15 at 11:23
@utility I've tried really, but google and stackoverflow find nothing :-( It's very complicated to find something with two symbols '?.' — Sasha Truf, May 19 '15 at 11:35

Milen · Accepted Answer · 2015-05-19T12:33:15.307

6

It's c# 6.0 syntax, Null propagation Operator. It means :

var p = man;

if(p != null)
{
   var result = man.Name;
}
else
{
   var result = null;
}

edited May 19 '15 at 12:33

answered May 19 '15 at 11:22

Milen

2

This isn't completely correct. If `man` is `null` then `result` will be set to `null` as well, which your example does not really show. – juharr May 19 '15 at 11:32
@Milen It's good article about c# 6.0, thank you! – Sasha Truf May 19 '15 at 11:42

Soner Gönül · Answer 2 · 2015-05-19T11:43:34.960

5

It is called Null-propagating operator in C#-6.0 version.

var result = man?.Name;

is equal to

var temp = man;
var result = (temp != null) ? man.Name : null;

edited May 19 '15 at 11:43

answered May 19 '15 at 11:24

Soner Gönül

Wow, I can't tell you how many times I've wished for that type of thing. – rory.ap May 19 '15 at 11:26

2 Answers2