Q:

Bottom borders on WPF Grid

I'd like to set a bottom border on each row in the grid, but can only find how to put all 4 borders around each cell.. 
<Grid Height="174" HorizontalAlignment="Left" Margin="23,289,0,0" Name="grid2" VerticalAlignment="Top" Width="730">
    <Grid. RowDefinitions>
        <RowDefinition Height="45" />
        <RowDefinition Height="25" />
        <RowDefinition Height="25" />
        <RowDefinition Height="25" />
        <RowDefinition Height="25" />
        <RowDefinition Height="25" />
    </Grid. RowDefinitions>
    <Grid. ColumnDefinitions>
        <ColumnDefinition Width="255" />
        <ColumnDefinition Width="95" />
        <ColumnDefinition Width="95" />
        <ColumnDefinition Width="95" />
        <ColumnDefinition Width="95" />
        <ColumnDefinition Width="95" />
    </Grid. ColumnDefinitions>
</Grid>

For another grid I'm using that needs all four borders, I'm using 
<Border Grid. Column="0" Grid. Row="0" BorderBrush="#61738B" BorderThickness="1" />

P.S. The contents of the grid are some labels, textboxes, etc.. if that matters at all. 

A:

On a Border control You can do BorderThickness="0 0 0 1" to only have a bottom border shown.  
Top and bottom border thickness of 5, left and right border thickness of 0
BorderThickness="0 5"
Top and bottom border thickness of 0, left and right border thickness of 5
BorderThickness="5 0"
Border Thickness - Left: 1, Top: 2, Right:3, Bottom: 4
BorderThickness="1 2 3 4"
Hope this helps!