Comments by Kevin Bewley (Top 1 by date)

Reason for my vote of 1 \n This isn't really a great example Doug. Bearing in mind the support in the FCL for xml and binary serialisation you could have made a nice example that created a List of Customer objects (encapsulating the data).
You could then have used serialisers to write the data out to EITHER an XML or a BINARY file. In terms of Editing and Deleting records, you'd just need to find the object in the list (perhaps give each Customer object a CustomerID) and alter the data for Edit, or .Remove it from the List for a delete.
Good idea, poor implementation not really harnessing the power and convenience of the .NET Framework.