How do I enable text wrapping on all column headers?

Or don’t bother with the primitives in the app.xaml file and do the following (my objects):

<DataGrid Name="WBdataGrid" AutoGenerateColumns="False" ColumnHeaderHeight="50" >
    <DataGrid.ColumnHeaderStyle>
        <Style TargetType="DataGridColumnHeader">
            <Setter Property="ContentTemplate">
                <Setter.Value>
                    <DataTemplate>
                        <TextBlock TextWrapping="Wrap" Text="{Binding}"></TextBlock>
                    </DataTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </DataGrid.ColumnHeaderStyle>
    <DataGrid.Columns> ...