When using Mahapps.Metro, last header of a GridView shows double vertical line

Question

I have a WPF project which uses Mahapps.Metro theming. When a theme is applied - GridView's last ColumnHeader shows two vertical lines. Is it possible to show only one vertical line instead? Checked in code-behind, GridView has 4 columns indeed. Tried changing these styles: MahApps.Styles.GridViewColumnHeader MahApps.Styles.Thumb.GridViewColumnHeaderGripper. But nothing worked for me.

Answer 1

Found it: Change style: "MahApps.Styles.GridViewColumnHeader", Element: "Thumb x:Name="PART_HeaderGripper"". Change its Margin from "0 0 -9 0" to "0 0 0 0"