qwerty/Cafe11/ofic.xaml

<Window x:Class="Cafe11.ofic"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Cafe11"
        mc:Ignorable="d"
        Title="ofic" Height="450" Width="800" Loaded="Window_Loaded">
    <Grid>
        <DataGrid x:Name="oftable" HorizontalAlignment="Left" Height="250" VerticalAlignment="Top" Width="784" Margin="0,160,0,0"/>
        <Label Content="ofic" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="347,0,0,0"/>
        <Button x:Name="btnnew" Content="new" HorizontalAlignment="Left" VerticalAlignment="Top" Width="75" Margin="331,136,0,0" Click="btnnew_Click"/>

    </Grid>
</Window>