avaloniax/AvaloniaHomeTry/Views/AuthPage.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
			 xmlns:vm="using:AvaloniaHomeTry.ViewModels"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="AvaloniaHomeTry.AuthPage"
			 x:DataType="vm:MainWindowViewModel">
	
	<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
			<TextBlock Text="Добро пожаловать!" HorizontalAlignment="Center" VerticalAlignment="Top"/>
			<TextBlock Text="Введите логин:"/>
			<TextBox Text="{Binding ContentDbVM.Login}"  Width="500"/>
			<TextBlock Text="Введите пароль:"/>
			<TextBox Text="{Binding ContentDbVM.Password}" PasswordChar="*"/>
			<TextBlock Text="{Binding ContentDbVM.Message}"/>
			<Button Content="Войти" Command="{Binding Enter}" HorizontalAlignment="Center" IsDefault="True"/>
			<Button Content="Регистрация" HorizontalAlignment="Center" Margin="30" Command="{Binding Registration}"/>
	</StackPanel>

</UserControl>