New Post: SelectAllOnGotFocus not working when DecimalUpDown control is used inside a WPF DataGrid (DataGridTemplateColumn.CellEditingTemplate)

Take a look at this code snippet inside a WPF :

<DataGridTemplateColumn>
<DataGridTemplateColumn.CellEditingTemplate>
   <DataTemplate>
      <Grid FocusManager.FocusedElement="{Binding ElementName=nud}">
         <xctk:DecimalUpDown Name="nud........................../>
      </Grid>
    </DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>

All works fine but SelectAllOnGotFocus in not working and text is not selected when the control gets focus either by double clicking or via keyboard Tab.

Any suggestions ?