Are these two lines the same, '? … :' vs '??'?

Question

Is there a difference between these two lines?

MyName = (s.MyName == null) ? string.Empty : s.MyName

or

MyName = s.MyName ?? st         


        

Answer 1

No. Both are doing the same thing. Second one is efficient. Which returns the actual value if it is not null. Else the right-hand side value will be returned.

Refer this http://msdn.microsoft.com/en-us/library/ms173224.aspx

Hope this helps.