Sneakers/SneakersSkakunov/Authorization.xaml

<Page x:Class="SneakersSkakunov.Authorization"
      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:SneakersSkakunov"
      mc:Ignorable="d" 
      d:DesignHeight="720" d:DesignWidth="1080"
      Title="Authorization">

    <Grid Background="#f5f5f5">
        <StackPanel HorizontalAlignment="Left" VerticalAlignment="Center"  >
            <Rectangle  Fill=" #dbdbdb" RadiusX="15" RadiusY="15" Margin="100" Height="500" Width="650"/>
        </StackPanel>
        <StackPanel Orientation="Vertical" HorizontalAlignment="Left" Margin=" 150" VerticalAlignment="Center" >
            <TextBlock FontWeight="DemiBold" Foreground="#292929" FontSize="40" HorizontalAlignment="Left" Width="245" Height="55"><Run Text="Авторизация"/></TextBlock>
        </StackPanel>
        <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,0,240,0">
            <Rectangle Fill="#292929" Height="320" Width="2" />
        </StackPanel>
        <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center" Margin="30,0,0,0">
            <TextBlock FontWeight="DemiBold" Foreground="#292929"  FontSize="15"><Run Text="Логин"/></TextBlock>
            <TextBox  BorderThickness="2" Height="25" BorderBrush="#292929"  x:Name="Login" Background="#f5f5f5" ></TextBox>
            <TextBlock FontWeight="DemiBold" Foreground="#292929"  FontSize="15"><Run Text="Пароль"/></TextBlock>
            <PasswordBox BorderThickness="2" Height="25" BorderBrush="#292929" x:Name="Pass" Background="#f5f5f5" />
            <Border BorderThickness="2" CornerRadius="4" BorderBrush="#292929" Background="#f5f5f5" Height="28" Margin="0,20,0,0">
                <Button Click="Enter_Click" Background="#0000" BorderBrush="#0000" Foreground="#292929" Content="Войти" FontWeight="Bold" FontSize="16" />
            </Border>
            <Button Click="GoReg_Click" Background="#0000" BorderBrush="#0000" FontSize="13" Margin="0,5,0,0">
                <TextBlock  Foreground="#757575"><Run Text="Зарегистрируйтесь, если нет аккаунта!"/></TextBlock>
            </Button>
        </StackPanel>

    </Grid>
</Page>