What does the "?" do when added to the end of a getter call?

I saw code that looked like this

Code (CSharp):

1. aGetter?.MethodInReturnedObject();

What does the "?" do here?

Thanks!

 

It checks if aGetter is null or not. If not, then it calls the function. If yes, it doesn't.

That's the null-conditional operator added in C# 6.

 

Thanks!

 

Note that you probably shouldn't be using that operator on most Unity objects, because Unity uses "pretend" null values for certain things that aren't really null for purposes of that operator.