MainWindow.xaml

<Window x:Class="FormSubmit2.MainWindow"
        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:FormSubmit2"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="34"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="0.5*"/>
            <ColumnDefinition Width="0.5*"/>
        </Grid.ColumnDefinitions>
        <Border BorderThickness="1" Grid.ColumnSpan="2">
            <WebBrowser Grid.Row="0" Name="webbrowser"/>
        </Border>
        <StackPanel Grid.Row="1" Orientation="Horizontal">
            <Button Content="Run default script" Width="150" Margin="3" Click="RunDefault"/>
        </StackPanel>
        <StackPanel Grid.Row="1" Orientation="Horizontal" HorizontalAlignment="Right" Grid.Column="1">
            <Button Content="Run Script" Width="100" Margin="3" Click="Run"/>
            <Button Content="List Element" Width="100" Margin="3" Click="OnList"/>
        </StackPanel>
    </Grid>
</Window>