<Window x:Class="ControlTemplate.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:ControlTemplate"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Window.Resources>
        <Style x:Key="ButtonStyle1" TargetType="{x:Type Button}">
            <Setter Property="FontSize" Value="30"/>
            <Setter Property="Margin" Value="10"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type Button}">
                        <Border BorderBrush="Yellow" BorderThickness="3" CornerRadius="10" Background="{TemplateBinding Background}">
                            <DockPanel LastChildFill="False">
                                <TextBlock Text="?(^_-)"  HorizontalAlignment="Left"
                                            VerticalAlignment="Center" Margin="5,0,0,0"/>
                                <ContentPresenter Margin="10,0,0,0" VerticalAlignment="{TemplateBinding VerticalAlignment}"></ContentPresenter>
                            </DockPanel>
                        </Border>
                        <ControlTemplate.Triggers >
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Background" Value="Red"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    
    <Grid>
        <StackPanel>
            <Button Height="60" Content="hello"   VerticalAlignment="Center" 
                    Style="{StaticResource ButtonStyle1}"/>
            <Button Height="80" Content="style"  VerticalAlignment="Center" 
                    Style="{StaticResource ButtonStyle1}"/>
        </StackPanel>
    </Grid>
</Window>