用VS制作简易计算器(WPF)

<Window x:Class="我的简易计算器.MainWindow"
        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:我的简易计算器"
        mc:Ignorable="d"
        Title="MainWindow" Height="472" Width="429">
    <Grid Margin="1,1,-37,18" HorizontalAlignment="Left" Width="400">
        <Grid.ColumnDefinitions >
            <ColumnDefinition />
            <ColumnDefinition />
            <ColumnDefinition />
            <ColumnDefinition />
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions >
            <RowDefinition Height=" 1*"/>
            <RowDefinition Height=" 1*"/>
            <RowDefinition Height=" 2*"/>
            <RowDefinition Height=" 2*"/>
            <RowDefinition Height=" 2*"/>
            <RowDefinition Height=" 2*"/>
            <RowDefinition Height=" 2*"/>
            <RowDefinition Height=" 2*"/>
        </Grid.RowDefinitions>
        <Button Content="7" FontSize="30" Width="40" Grid.Row="4" Grid.Column="0" Click="Button_Click_1"  Margin="16,6,15,10"  />
        <Button Content="8" FontSize="30" Width="40" Grid.Row="4" Grid.Column="1" Click="Button_Click_1"  Margin="16,6,15,10"  />
        <Button Content="9" FontSize="30" Width="40" Grid.Row="4" Grid.Column="2" Click="Button_Click_1"  Margin="16,6,15,10"  />
        <Button Content="4" FontSize="30" Width="40" Grid.Row="5" Grid.Column="0" Click="Button_Click_1"  Margin="16,6,15,10"  />
        <Button Content="5" FontSize="30" Width="40" Grid.Row="5" Grid.Column="1" Click="Button_Click_1"  Margin="16,6,15,10"  />
        <Button Content="6" FontSize="30" Width="40" Grid.Row="5" Grid.Column="2" Click="Button_Click_1"  Margin="16,6,15,10"  />
        <Button Content="1" FontSize="30" Width="40" Grid.Row="6" Grid.Column="0" Click="Button_Click_1"  Margin="16,6,15,10"  />
        <Button Content="2" FontSize="30" Width="40" Grid.Row="6" Grid.Column="1" Click="Button_Click_1"  Margin="16,6,15,10"  />
        <Button Content="3" FontSize="30" Width="40" Grid.Row="6" Grid.Column="2" Click="Button_Click_1"  Margin="16,6,15,10"  />
        <Button Content="." FontSize="30" Width="40" Grid.Row="7" Grid.Column="2" Click="Button_Click_1"  Margin="16,6,15,10" Grid.ColumnSpan="1" Name="dian" />
        <Button Content="0" FontSize="30" Grid.Row="7" Click="Button_Click_1"  Margin="26,6,26,10" Name="BO" Grid.ColumnSpan="2"  />
        <Button Name="add" FontSize="30" Width="40" Grid.Row="7" Grid.Column="3" Content="+" Click=" FH_Click_1" Margin="16,6,15,10" />
        <Button Name="Minus" FontSize="30" Width="40" Grid.Row="6" Grid.Column="3" Content="-" Click=" FH_Click_1" Margin="16,6,15,10" />
        <Button Name="Multiply" FontSize="30" Width="40" Grid.Row="5" Grid.Column="3" Content="*" Click=" FH_Click_1" Margin="16,6,15,10"/>
        <Button Name="divide" FontSize="20" Width="40" Grid.Row="4" Grid.Column="3" Content="/" Click=" FH_Click_1" Margin="16,6,15,10" />
        <Button Name="tuige" FontSize="30" Width="40" Grid.Row="3" Grid.Column="0" Content="←" Click=" FH_Click_1" Margin="16,6,15,10" />
        <Button Name="daoshu" FontSize="20" Width="40" Grid.Row="5" Grid.Column="4" Content="1/x" Click=" FH_Click_1" Margin="16,6,15,10" />
        <Button Name="result" FontSize="30" Grid.Row="6" Grid.Column="4" Content="=" Click=" FH_Click_1" Margin="24,10,22,10" Grid.RowSpan="2"/>
        <Button Name="delect1" FontSize="30" Width="40" Grid.Row="3" Grid.Column="1" Content="CE" Click=" FH_Click_1" Margin="16,6,15,10" />
        <Button Name="delect2" FontSize="30" Width="40" Grid.Row="3" Grid.Column="2" Content="C" Click=" FH_Click_1" Margin="16,6,15,10" />
        <Button Name="yu" FontSize="20" Width="40" Grid.Row="4" Grid.Column="4" Content="%" Click=" FH_Click_1" Margin="16,6,15,10" />
        <Button Name="jiajian" FontSize="30" Width="40" Grid.Row="3" Grid.Column="3" Content="±" Click=" FH_Click_1" Margin="16,6,15,10" />
        <Button Name="genhao" FontSize="20" Width="40" Grid.Row="3" Grid.Column="4" Content="√" Click=" FH_Click_1" Margin="16,6,15,10" />
        <TextBlock Name="gc" FontSize="20" HorizontalAlignment="Right" Margin="0,20,22,0" TextWrapping="Wrap" VerticalAlignment="Top" Height="41" Grid.ColumnSpan="5" Width="358" Background="#999" Grid.RowSpan="2"/>
        <TextBlock Name="JG" FontSize="20" HorizontalAlignment="Right" Margin="0,0,22,11" Grid.Row="2" TextWrapping="Wrap"  VerticalAlignment="Center" Height="49" Grid.ColumnSpan="5" Width="358" Background="#999"/>
    </Grid>
</Window>