IsNullOrWhiteSpace extension method in .Net 4?

Question

Is there an extension method for IsNullOrWhiteSpace defined in .Net 4?

I have used this extension method before, but I can't find it, and I'm starting to wonder if I was using a custom extension at the time without realizing it.

Answer 1

You probably had a reference to WebGrease.dll. In the Microsoft.Ajax.Utilities namespace, there is an IsNullOrWhiteSpace() extension method on string.

using Microsoft.Ajax.Utilities;

"".IsNullOrWhiteSpace(); //This compiles