AvaloniaKnuScool/Views/Authorization.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"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="AvaloniaApplication1.Authorization"
             xmlns:vm="using:AvaloniaApplication1.ViewModels"
			       x:DataType="vm:MainWindowViewModel">
  <StackPanel HorizontalAlignment="Center" >
    <TextBlock HorizontalAlignment="Center" Margin="0,10,0,0" FontSize="20" Text="АВТОРИЗАЦИЯ"/>
    <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center" Width="200">
      <TextBlock HorizontalAlignment="Center" Margin="0,10,0,0" FontSize="18" Text="Логин"/>
      <TextBox Text="{Binding AuthorizationVM.Login}"/>
      <TextBlock HorizontalAlignment="Center" Margin="0,10,0,0" FontSize="18" Text="Пароль"/>
      <TextBox Text="{Binding AuthorizationVM.Pass}" PasswordChar="♪" Name="Pass"/>
      <Button HorizontalAlignment="Center" Command="{Binding GoAuth}" Margin="0,10,0,0" Content="Войти"/>
    </StackPanel>
    
  </StackPanel>
</UserControl>