TestR/WpfAppProject/pages/PageAuto.xaml

<Page x:Class="WpfAppProject.pages.PageAuto"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      xmlns:local="clr-namespace:WpfAppProject.pages"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="PageAuto">

    <Grid>
        <StackPanel Width="300">
            <GroupBox Header="Логин">
                <TextBox Name="TbLogin"/>
            </GroupBox>
            <GroupBox Header="Пароль">
                <TextBox Name="TbPassword"/>
            </GroupBox>
            <Button Name="BtnEnter" Content="Enter" Click="BtnEnter_Click"/>
            <Button Name="BtnRegistration" Content="Reg" Click="BtnRegistration_Click"/>
            
        </StackPanel>
        
    </Grid>
</Page>