An object can't be null - the value of an expression can be null. It's worth making the difference clear in your mind. The value of
s isn't an object - it's a reference, which is either null or refers to an object.
And yes, you should just use
if (s == null)
Note that this will still use the overloaded == operator defined in string, but that will do the right thing.
~ Answered on 2011-09-26 10:12:42