Creating Business Objects
in booth the C# and VB jump starts have the following error

Step 6
Under "Adding Methods to the Order Business Object"

C#
1. Double-click the OrderDetail.Partial.cs file to open it in the code editor.
this should read
Double-click the Order.Partial.cs file to open it in the code editor.

VB
1. Double-click the OrderDetail.Partial.vb file to open it in the code editor.
this should read
Double-click the Order.Partial.vb file to open it in the code editor.