Avalonia/AvaloniaApplication3/Views/AuthorizationPage.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             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:vm="using:AvaloniaApplication3.ViewModels"
             mc:Ignorable="d" d:DesignWidth="500" d:DesignHeight="600"
             x:Class="AvaloniaApplication3.Views.AuthorizationPage"
			 x:DataType="vm:MainWindowViewModel"
			 x:CompileBindings="True">
	
	<StackPanel Orientation="Vertical" HorizontalAlignment="Center" VerticalAlignment="Center">
		<Image Margin="0 0 0 12" Source="/Images/waving-hand.png" Height="30" Width="30" HorizontalAlignment="Left"/>
		<TextBlock Text="С возвращением!" Margin="0 0 0 12" Classes="title"/>
		<TextBlock Text="Авторизуйтесь, чтобы получить доступ к аккунту" Margin="0 0 0 62"/>
		<StackPanel Orientation="Vertical" Margin="0 0 0 30">
			<TextBlock Text="Логин" Margin="0 0 0 10"/>
			<TextBox Watermark="Введите ваш логин" Text="{Binding Login}"/>
		</StackPanel>
		<StackPanel Orientation="Vertical" Margin="0 0 0 44">
			<TextBlock Text="Пароль" Margin="0 0 0 10"/>
			<TextBox Classes="revealPasswordButton" Text="{Binding Pass}" PasswordChar="•" Watermark="Введите ваш пароль" Margin="0 0 0 10"/>
			<TextBlock Classes="error" Text="{Binding ErrorMessage}" Margin="0 0 0 30"></TextBlock>
			<Button Classes="blueBtn" HorizontalAlignment="Stretch" Command="{Binding LogIn}" CommandParameter="{Binding $parent[Window]}">Войти</Button>
		</StackPanel>
		<TextBlock Text="Нет аккаунта? / Забыли пароль (потом)" Margin="0 0 0 10" HorizontalAlignment="Center"/>
		<Button Content="Зарегестироваться" HorizontalAlignment="Center" Command="{Binding ToRegisterPage}"/>
	</StackPanel>
</UserControl>