demoekz/Cafe/MainPage.xaml

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

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <TextBox Grid.Column="1" Height="35" Width="75" HorizontalAlignment="Left" VerticalAlignment="Bottom" Margin="10"  TextAlignment="Center" Name="LoginTBox"></TextBox>
        <PasswordBox Grid.Column="1" Grid.Row="1" Height="35" Width="75" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="10" Name="PsswrdBox"></PasswordBox>
        <TextBlock Grid.Column="0" Height="35" Width="75" HorizontalAlignment="Right" VerticalAlignment="Bottom" Margin="10" TextAlignment="Center">Login</TextBlock>
        <TextBlock Grid.Column="0" Grid.Row="1" Height="35" Width="75" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="10" TextAlignment="Center">Password</TextBlock>

        <Button Grid.ColumnSpan="2" Grid.Row="1" Height="35" Width="75" Name="LoginBtn" Click="LoginBtn_Click">Authorize</Button>
    </Grid>
</Page>