程式碼：

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="WpfApplication4.MainWindow"
        Title="MainWindow" Height="350" Width="525">
	<Window.Resources>
		<Style x:Key="ButtonFocusVisual">
			<Setter Property="Control.Template">
				<Setter.Value>
					<ControlTemplate>
						<Rectangle Margin="2" SnapsToDevicePixels="true" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
					</ControlTemplate>
				</Setter.Value>
			</Setter>
		</Style>
		<LinearGradientBrush x:Key="ButtonNormalBackground" EndPoint="0,1" StartPoint="0,0">
			<GradientStop Color="#F3F3F3" Offset="0"/>
			<GradientStop Color="#EBEBEB" Offset="0.5"/>
			<GradientStop Color="#DDDDDD" Offset="0.5"/>
			<GradientStop Color="#CDCDCD" Offset="1"/>
		</LinearGradientBrush>
		<SolidColorBrush x:Key="ButtonNormalBorder" Color="#FF707070"/>
		<Style x:Key="ButtonStyle1" TargetType="{x:Type Button}">
			<Setter Property="FocusVisualStyle" Value="{StaticResource ButtonFocusVisual}"/>
			<!--修改背景Background-->
			<!--"Setter Property="Background" Value="{StaticResource ButtonNormalBackground}"/-->
			<Setter Property="Background" Value="#FF8FC0E7"/>
			<Setter Property="BorderBrush" Value="{StaticResource ButtonNormalBorder}"/>
			<!--不需要邊框，設定邊框寬度為0-->
			<!--Setter Property="BorderThickness" Value="1"/-->
			<Setter Property="BorderThickness" Value="0"/>
			<!--修改前景Foreground-->
			<!--Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/-->
			<Setter Property="Foreground" Value="White"/>
			<Setter Property="HorizontalContentAlignment" Value="Center"/>
			<Setter Property="VerticalContentAlignment" Value="Center"/>
			<Setter Property="Padding" Value="1"/>
			<Setter Property="Template">
				<Setter.Value>
					<ControlTemplate TargetType="{x:Type Button}">
						<!--將Themes:ButtonChrome修改為Border控制元件-->
						<!--Themes:ButtonChrome x:Name="Chrome" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}" RenderDefaulted="{TemplateBinding IsDefaulted}" SnapsToDevicePixels="true">
							<ContentPresenter HorizontalAlignment="Left" Margin="16.057,1,0,1" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
						</Themes:ButtonChrome-->
						<Border BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" SnapsToDevicePixels="true"
							CornerRadius="5">
							<Grid Height="33">
								<Grid.ColumnDefinitions>
									<ColumnDefinition/>
									<ColumnDefinition Width="2*"/>
								</Grid.ColumnDefinitions>
								<ContentPresenter  Grid.Column="1" HorizontalAlignment="Center" Margin="5.057,8.88,0,8.88" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
								<Path Grid.Column="0" Data="M5,15 L17.5,15" Fill="#FFF4F4F5" HorizontalAlignment="Left" Height="2.5" Margin="5,13.5,0,0" Stretch="Fill" Stroke="White" VerticalAlignment="Top" Width="13.5" StrokeThickness="5"/>
								<Path Grid.Column="0" Data="M11,7 L11,21.5" Fill="#FFF4F4F5" HorizontalAlignment="Left" Height="15.5" Margin="10.5,7,0,0" Stretch="Fill" Stroke="White" VerticalAlignment="Top" Width="1.5" StrokeThickness="5"/>
							</Grid>
						</Border>
						<!--取消原生的Themes:ButtonChrome觸發器效果，如需要一些選擇效果，根據自己需要加上-->
						<!--ControlTemplate.Triggers>
							<Trigger Property="IsKeyboardFocused" Value="true">
								<Setter Property="RenderDefaulted" TargetName="Chrome" Value="true"/>
							</Trigger>
							<Trigger Property="ToggleButton.IsChecked" Value="true">
								<Setter Property="RenderPressed" TargetName="Chrome" Value="true"/>
							</Trigger>
							<Trigger Property="IsEnabled" Value="false">
								<Setter Property="Foreground" Value="#ADADAD"/>
							</Trigger>
						</ControlTemplate.Triggers-->
					</ControlTemplate>
				</Setter.Value>
			</Setter>
		</Style>
	</Window.Resources>
	<Grid>
		<Button Content="好友" HorizontalAlignment="Left" Margin="223,123,0,0" VerticalAlignment="Top" Width="75" Style="{DynamicResource ButtonStyle1}" />
		<Button Content="Button" HorizontalAlignment="Left" Margin="56,123,0,0" VerticalAlignment="Top" Width="75" Height="33"/>
        
	</Grid>
</Window>