How to add a datepicker in WPF

How to add a datepicker in WPF

<DataGrid Name="myfirstdg" Grid.Row="2" AutoGenerateColumns="False"
CanUserSortColumns="False" CanUserAddRows="False"
CanUserDeleteRows="False" SelectionUnit="Cell" >
<DataGrid.Columns>
<DataGridTextColumn Header="Date" Binding="{Binding
Path=date}" Width="SizeToCells" IsReadOnly="True"
MinWidth="100"></DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>
i have a simple dategrid with a DataGridTextColumn in it. My question is
how do i add a Datepicker to my DataGridTextColumn thanks in advanced for
your help