Ich habe Probleme, das TextWrapping in diesem Beispiel zum Laufen zu bringen. Kann jemand sehen, was ich hier falsch mache?

    <ListView Name="listViewReportedException" ItemsSource="{Binding ExceptionDetails}">
        <ListView.View>
            <GridView>
                <GridViewColumn Header="Time" DisplayMemberBinding="{Binding Thrown}" Width="150" />
                <GridViewColumn Header="Description" DisplayMemberBinding="{Binding Description}" Width="385">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock TextWrapping="Wrap" Text="{Binding}" Width="385"/>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
                <GridViewColumn Header="Recover action" DisplayMemberBinding="{Binding Action}" Width="90"/>
            </GridView>
        </ListView.View>
    </ListView>