Datagrid  Date column format : 
<sdk:DataGridTextColumn Header="From" IsReadOnly="True"
                                                Binding="{Binding FromDate, StringFormat='{}{0:MM/dd/yyyy}'}" Width="auto"/>


<sdk:DataGridTextColumn Header="Discharge Date"
                                                Binding="{Binding DischargeDate, StringFormat='{}{0:MM/dd/yyyy a\\t h:mm tt}'}"/>