I would like my button to have the shape of the letter "L" as in this picture [Simple Paint Example](https://i.stack.imgur.com/BrJ0s.png). The only examples I can find are if you want the button to be round or like a lemon. I know that I need to use template but how exactly I don't understand.

The Code is in the App.xaml for global using.

```
<!--#region LButton-->
    <ControlTemplate x:Key="LButton" TargetType="Button">
        <Grid Width="100" Height="100">
            <Border BorderThickness="1" Grid.Row="0" Grid.ColumnSpan="2" BorderBrush="Black" Background="LightGreen">
               <TextBlock Text="{TemplateBinding Button.Content}" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="40"/>
            </Border>
        </Grid>
    </ControlTemplate>
<!--#endregion-->

```

I know i can add CornerRadius="30,30,30,30" that the Button has Rounded Corners.

Thx for your help. Best Regards Shazzar