Files to look at:

• Employees.cs (VB: Employees.vb)
• MainWindow.xaml (VB: MainWindow.xaml)
• MainWindow.xaml.cs (VB: MainWindow.xaml.vb)

This example shows how to apply DataAnnotations attributes that specify data validation rules. The RequiredAttribute is applied to the 'Name' and 'Department' data fields. The StringLengthAttribute is applied to the 'Position' data field.

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