<Window x:Class="HelloWorld.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"

        mc:Ignorable="d"

        Title="MainWindow" Height="450" Width="800" Loaded="Window_Loaded">

    <Window.Resources>

        <!-- 下面是设置让所有的 Button 控件的默认样式 -->

        <Style TargetType="{x:Type Button}">

            <Setter Property="Margin" Value="5"></Setter>

            <Setter Property="Padding" Value="5"></Setter>

            <!--<Setter Property="HorizontalAlignment" Value="Center" />

            <Setter Property="VerticalAlignment" Value="Center" />-->

        </Style>

    </Window.Resources>

    <Grid>

        <Grid.RowDefinitions>

            <RowDefinition Height="Auto"/><!-- 实际高度 -->

            <RowDefinition Height="*"/><!-- 剩余高度 -->

            <RowDefinition Height="Auto"/><!-- 实际高度 -->

        </Grid.RowDefinitions>

        <Label Grid.Row="0" x:Name="label1" Content="Hello World " HorizontalAlignment="Center" VerticalAlignment="Center"

               FontSize="20" DockPanel.Dock="Top"/>

        <Grid Grid.Row="2">

            <Grid.RowDefinitions>

                <RowDefinition Height="Auto" /><!-- 实际高度 -->

                <RowDefinition Height="Auto" /><!-- 实际高度 -->

                <RowDefinition Height="*" /><!-- 剩余高度 -->

            </Grid.RowDefinitions>

            <Button Grid.Row="0" Name="Button1" DockPanel.Dock="Top" Height="Auto" Content="Button1" />

            <Button Grid.Row="1" Name="Button2" DockPanel.Dock="Top" Height="Auto" Content="Button2" />

            <ListBox x:Name="ListBoxLog"

                    Grid.Row="2"

                    SelectionMode="Single"/>

        </Grid>

        <Button Grid.Row="3" DockPanel.Dock="Bottom"  Content="Exit" FontSize="20" />

    </Grid>

</Window>