PGK extension uses the system namespaces.
So you don't have to add any using.
You should already be able to use it.
IsNull() being the extension method.
The is another branch that are being worked on. Putting all the extensions method into a namespace.
Let us know how you go or that you have other questions.
I have added a reference to PGK.Extensions.dll. But my Using statement gives the above error message.
What is the namespace that I need to use for PGK.Extensions?