How can I make _Path1 to streach within the width of the _Grid1 for the TabItem
<!--Style for the TabItem.-->
<Style x:Key="OldTabItemStyle" TargetType="{x:Type TabItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Border Name="border2">
<Grid x:Name _Grid1>
<Path x:Name _Path1 Stretch="Fill" Margin="0,0,0,0" StrokeThickness="2" Data="M0,0 L81,0 81,80 0,80 z">
<Path.Fill>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFE1E2E4" Offset="0"/>
<GradientStop Color="#99788590" Offset="1"/>
</LinearGradientBrush>
</Path.Fill>
<Path.Stroke>
<RadialGradientBrush>
<GradientStop Color="#FFFFFFFF" Offset="1"/>
<GradientStop Color="#FFFFFFFF" Offset="0.534"/>
</RadialGradientBrush>
</Path.Stroke>
</Path>
<ContentPresenter x:Name="Content1"/>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

