" WPF DataGrid Practical Examples " is giving error

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C#

WPF

MVVM

DataGrid

Here is the link to this articles WPF DataGrid Practical Examples
Ran the code with Visual Studio 2012 after installing the WPF Toolkit from add refrences. It compiles, and appears to run, but the buttons do not all work correctly.

That buttons that crashes the program are listed
1-Simple CRUD Example
2-Master Details Example
3-Layered Application Example
4-Validation with DataSet
5-Row Header Example


The debugger displays errors similiar to the following that occurs when the "Simple CRUD Example" is pressed:

Quote:

Exception of type 'XamlParseExceptionOccured' occurred in XAML file.
Additional information: Failed object initialization (ISupportInitialize.EndInit). Exception has been thrown by the target of an invocation. Error at object 'CustomerDataProvider' in markup file 'WPFDataGridExamples;component/datasetexamples/datasetcrudexample.xaml' Line 10 Position 58.

The indicated failed line reads

<ObjectDataProvider x:Key="CustomerDataProvider" ObjectType="{x:Type local:CustomerDataProvider}"/>

Can anyone offer any insight or fix?