<Grid> <
Button Content="Add" HorizontalAlignment="Left" Margin="58,142,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click"/> <TextBox HorizontalAlignment="Left" Height="23" Margin="190,50,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120" Name="t1" Text=" "/> <TextBox HorizontalAlignment="Left" Height="23" Margin="190,94,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120" Name="t2"/> <TextBox HorizontalAlignment="Left" Height="23" Margin="190,180,0,0" TextWrapping="Wrap" Text="
" VerticalAlignment="Top" Width="120" Name="t3"/> <Button Content="Sub" HorizontalAlignment="Left" Margin="164,142,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click_1"/> <Button Content="Mul" HorizontalAlignment="Left" Margin="273,142,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click_2"/> <Button Content="Div" HorizontalAlignment="Left" Margin="384,142,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click_3"/> </Grid>