AvtoserviceDrive/AutoservisDrive/Pages/LoginPage.xaml

<Page x:Class="AutoservisDrive.Pages.LoginPage"
      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:AutoservisDrive.Pages"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="Авторизация">

    <Grid>
        <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
            <StackPanel Orientation="Horizontal">
                <TextBlock Style="{StaticResource BlockHeader}" FontSize="16" FontFamily="Arial" Text="Логин: "/>
                <Separator Width="33" Background="{x:Null}"/>
                <TextBox Name="TBoxLogin" Width="150" Height="20"/>
            </StackPanel>

            <Separator Height="15" Background="{x:Null}"/>

            <StackPanel Orientation="Horizontal">
                <TextBlock Text="Пароль: " Style="{StaticResource BlockHeader}" FontSize="16" FontFamily="Arial"/>
                <Separator Width="20" Background="{x:Null}"/>
                <PasswordBox Name="PBoxPassword" Width="150" Height="20"/>
            </StackPanel>
            <Separator Height="15" Background="{x:Null}"/>

            <Button Name="BtnLogin" Content="Войти" HorizontalAlignment="Right" Style="{StaticResource BackButton}" Width="150" Height="25" FontSize="16" Click="BtnLogin_Click"/>

        </StackPanel>
        
    </Grid>
</Page>