>Kevin:
>
>I am getting error in Step 4:Creating a Customers Order Window of WPF project. Screenshot attached with this message.
>
>Basically there is namespace "d" that's not declared.
>
>Please advice.
>
>Thanks,
>navneet

You could just add this to the top. I never quite understood why this was needed and if you weren't referencing it, I guess it wouldn't be.

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"