Comments on: Nullable Types in C#

By: Judah

Judah — Fri, 17 Aug 2007 19:57:30 +0000

Actually, ?? works on any reference or Nullable type.

For example,

string IamNull = null;
string nonNull = “foo”;
string s = IamNull ?? nonNull;

s gets set to nonNull

Padraig — Fri, 17 Aug 2007 16:47:15 +0000

Don’t forget the ?? shortcut for GetValueOrDefault

int m = i ?? 0;

m will have the value 0 if i is null, or i if it is not null.

Dave Ward — Fri, 17 Aug 2007 16:22:10 +0000

I like the readability of .HasValue.

Judah — Tue, 14 Aug 2007 16:45:04 +0000

You don’t have to use the .HasValue property. The compiler is smart enough to figure out what you mean if you say something like

int? i = 5;
if(i != null)
{
// use it here
}