I have looked hard and long all over the Internet for a way to right-justify my numerical columns. The ONLY one that has worked for me is to stay away from this way of coding (which is simple, nice and readable):
<DataGridTextColumn Header="Total Height" Binding="{Binding Path=TotalHeight, StringFormat=0.00}" CellStyle="{StaticResource ReadOnlyCell}"></DataGridTextColumn>opting instead for this one:
<DataGridTemplateColumn Header="Total Height" CellStyle="{StaticResource ReadOnlyCell}"><DataGridTemplateColumn.CellTemplate><DataTemplate><TextBlock TextAlignment="Right" Text="{Binding TotalHeight, StringFormat=0.00}"/></DataTemplate></DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn>Frankly, I didn't care for the extra complexity, but I was willing to accept it as long as my columns were (finally!!) right-justified, after a LOT of failed experiments.
The new PROBLEM is that when designating the columns as DataGridTemplateColumn, they cannot be sorted by clicking on the header.