How to hide the last horizontal line in data grid? - wpf

Question

using System.Collections.Generic;
using System.Windows;
using System.Windows.Media;
namespace MergeGridTest
{
/// <summary>
/// test1window.xaml 的交互逻辑
/// </summary>
public partial class test1window : Window
{
DrawingVisual dv = new DrawingVisual();
public test1window()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
var Doctors = new List<Doctor>()
{
new Doctor(){Name="Zhang",Score=15,Address="Chengdu",Dept="Neike"},
new Doctor(){Name="Zhang",Score=18,Address="Chengdu",Dept="Neike"},
new Doctor(){Name="Zhang",Score=17,Address="Chengdu",Dept="Neike"},
new Doctor(){Name="Liu",Score=15,Address="Chengdu",Dept="Thke" },
new Doctor(){Name="Liu",Score=18,Address="MianYang",Dept="Thke"},
new Doctor(){Name="Liu",Score=17,Address="MianYang",Dept="Thke"}
};
TestGrid.ItemsSource = Doctors;
}
}
class Doctor
{
public string Name { get; set; }
public int Score { get; set; }
public string Address { get; set; }
public string Dept { get; set; }
}
}
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:MergeGridTest"
xmlns:Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero2" x:Class="MergeGridTest.test1window"
mc:Ignorable="d"
Title="test1window" Height="450" Width="800" Loaded="Window_Loaded">
<Grid>
<DataGrid Background="LightBlue" x:Name="TestGrid" AutoGenerateColumns="False" Margin="50" IsReadOnly="True"
CanUserAddRows="False" ItemsSource="{Binding}"
RowHeight="30" HorizontalGridLinesBrush="#FFCB0202" VerticalGridLinesBrush="{x:Null}" VerticalContentAlignment="Center">
<DataGrid.Columns>
<DataGridTextColumn Header="Address" Binding="{Binding Name}" Width="*"/>
<DataGridTextColumn Header="Score" Binding="{Binding Score}" Width="*"/>
<DataGridTextColumn Header="Address" Binding="{Binding Address}" Width="*"/>
</DataGrid.Columns>
</DataGrid>
</Grid>
</Window>
(https://note.youdao.com/yws/public/resource/ae451287f619092cc8b0485de1ddc297/xmlnote/AC1E5BD45A1C46A190271C395E0BBAA2/23392)
as show,I don't want to show the last line's (the last red line) under line in this data grid, but other horizontal line show normally, how to do it?
the data grid's line setting is for all lines, so I can't set the line visual style only the last line.