ErmolinExamApplication/Auth.xaml

<Page x:Class="ModuleExam.Auth"
      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:ModuleExam"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="Auth">

    <Grid Background="White">
        <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center" Width="200">
            <TextBlock Text="Электронная почта"/>
            <TextBox Name="Email"/>
            <TextBlock Text="Пароль"/>
            <PasswordBox Name="Pass"/>
            <Button Margin="0,10,0,0" Content="Войти" Click="MakeAuth"/>
        </StackPanel>
    </Grid>
</Page>