, Mode=OneWay, RelativeSource={RelativeSource FindAncestor, AncestorType=Window}}">                     <GridViewColumn.CellTemplate>                         <DataTemplate>                             <TextBlock TextWrapping="WrapWithOverflow" TextAlignment="Center"/>                         </DataTemplate>                     </GridViewColumn.CellTemplate>                 </GridViewColumn>                 <GridViewColumn Width="0000" Header="Message">                     <GridViewColumn.CellTemplate>                         <DataTemplate>                             <TextBlock TextWrapping="WrapWithOverflow" Text="{Binding