WebAuthenticationBrokerWindow.xaml

<?xml version="1.0" encoding="utf-8"?>
<ContentDialog
    x:Class="Firebase.Auth.UI.WebAuthenticationBrokerWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"   
    mc:Ignorable="d" Title="Connecting to a service">
    <ContentDialog.Resources>
        <x:Double x:Key="ContentDialogMaxWidth">1200</x:Double>
        <x:Double x:Key="ContentDialogMaxHeight">1000</x:Double> 
    </ContentDialog.Resources>

    <WebView2 x:Name="WebView" x:FieldModifier="public" Height="650" Width="600"        
              HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>

</ContentDialog>