MainPage.xaml

<Page
    x:Class="Win10_IOTCore_WebBrowser.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Win10_IOTCore_WebBrowser"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <StackPanel HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Orientation="Vertical">
            <StackPanel Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Orientation="Horizontal" 
                        HorizontalAlignment="Center" Name="Container">
                <Canvas Width="1000" Height="40">
                    <TextBox Text="" Name="UrlBar" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
                         FontSize="17" KeyDown="UrlBar_KeyDown" BorderThickness="1" Margin="0"></TextBox>
                    <ProgressRing Name="Progress" HorizontalAlignment="Right" VerticalAlignment="Top" Visibility="Visible"></ProgressRing>
                </Canvas>
                <Button Content="GOOGLE" Name="GoBtn" Click="GoBtn_Click" Height="40"></Button>
            </StackPanel>

            <StackPanel Name="StkCont" HorizontalAlignment="Stretch" Height="750" BorderBrush="Blue" BorderThickness="0 2 0 0">
                <WebView Width="1000" Height="750" Name="wv"
                         NavigationStarting="wv_ContentLoading"
                         DOMContentLoaded="wv_DOMContentLoaded"></WebView>
            </StackPanel>
        </StackPanel>

        <Canvas>
            <TextBlock Text="Loading..." HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="20" Foreground="Red" Name="LoadingTxt" Visibility="Collapsed"></TextBlock>
        </Canvas>
    </Grid>
</Page>