<Custom:DataGrid Margin="5" x:Name="grdCountries" IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding Mode=OneWay}" SelectionMode="Single" GridLinesVisibility="None" HeadersVisibility="Column" Grid.Column="0" AutoGenerateColumns="False" Grid.ColumnSpan="1" Style="{DynamicResource HDSDataGridStyle}"> <Custom:DataGrid.Columns> <Custom:DataGridTextColumn Header="Code" Width="0.2*" Binding="{Binding cnt_code, Mode=OneWay}" CanUserReorder="True" CanUserResize="True" CanUserSort="True" SortMemberPath="cnt_code" /> <Custom:DataGridTextColumn Header="Country" Width="0.8*" Binding="{Binding cnt_name, Mode=OneWay}" CanUserReorder="True" CanUserResize="True" CanUserSort="True" SortMemberPath="cnt_name" /> </Custom:DataGrid.Columns> </Custom:DataGrid>Any ideas?