MMC 3.0 Sample ExtensibleSnapIn and ExtensionToSample error when retrieving SharedData

Using VS2008.

I'm creating a prototype based upon the samples ExtensibleSnapIn and ExtensionToSample.

In ExtensionToSample, I am using the following code...

string test = Encoding.Unicode.GetString(PrimaryNode.SharedData.GetItem(ConfigurationName).GetData());

This causes an exception since GetData returns null.

So, I'm looking for an example that work.

Thanks Rich