How useful is C#'s ?? operator?

Question

So I have been intrigued by the ?? operator, but have still been unable to use it. I usually think about it when I am doing something like:

var x = (someObje         


        

Answer 1

I usually use it for strings or nullable types.

string s = someString ?? "Default message";

is easier than

   string s;
   if(someString == null)
     s = "Default Message";         
   else
     s = someString;

or

  string s = someString != null ? someString : "Default Message";