I am using wpf framework 3.5 for this I had to use winworms -> datetimepicker. I need to do Binding on the Text
<wfi:WindowsFormsHost >
<wf:DateTimePicker Format="Short" Text="{Binding date, Converter={StaticResource conkey}}" x:Name="p_datePicker" />
</wfi:WindowsFormsHost>
EDIT: Answer: The need to use WPF toolKit DatePicker and do not forget to connect the reffrenses