AvaloniaKnuScool/Views/PersonalPage.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.PersonalPage"
             x:DataType="vm:MainWindowViewModel"
             xmlns:vm="using:AvaloniaApplication1.ViewModels">

  <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">

    <StackPanel HorizontalAlignment="Left" Width="350" Margin="10,10,0,0">
      <TextBlock FontWeight="Bold" Text="Информация о пользователе"/>
      <TextBox Margin="0,10,0,0" Watermark="Фамилия" Text="{Binding PPVM.UserData.Teacher.Surname}"/>
      <TextBox Margin="0,10,0,0" Watermark="Имя" Text="{Binding PPVM.UserData.Teacher.Name}"/>
      <TextBox Margin="0,10,0,0" Watermark="Отчество" Text="{Binding PPVM.UserData.Teacher.Patronymic}"/>
      <TextBox Margin="0,10,0,0" Watermark="Логин" Text="{Binding PPVM.UserData.Login}"/>
      <ComboBox Margin="0,10,0,0" Width="150" ItemsSource="{Binding PPVM.Genders}" SelectedItem="{Binding PPVM.SelectedGender}"/>
      <DatePicker Margin="0,10,0,0" SelectedDate="{Binding PPVM.DR}"/>
      <TextBox Margin="0,10,0,0" Watermark="Емайл" Text="{Binding PPVM.UserData.Teacher.Email}"/>
      <TextBox Margin="0,10,0,0" Watermark="89XXXXXXXXX" Text="{Binding PPVM.UserData.Teacher.Phone}"/>
      <Button Command="{Binding PPVM.FixChanges}" HorizontalAlignment="Center" Margin="0,30,0,0" Content="Изменить данные"/>
    </StackPanel>
    
    <StackPanel Margin="30,0,0,0"  HorizontalAlignment="Right">
      <CheckBox Command="{Binding PPVM.Checked}" Content="Изменить пароль?"/>
      <TextBox Text="{Binding PPVM.NewPass}" IsVisible="{Binding PPVM.Enable}" Watermark="Новый пароль" Margin="0,10,0,0" PasswordChar="♫"/>
      <TextBox Text="{Binding PPVM.NewPassRepeat}" IsVisible="{Binding PPVM.Enable}" Watermark="Новый пароль ещё раз" Margin="0,10,0,0" PasswordChar="♫" />
    </StackPanel>
    
  </StackPanel>
</UserControl>