WPF-编辑圆角TextBox

<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" x:Class="模板.MainWindow"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <LinearGradientBrush x:Key="TextBoxBorder" EndPoint="0,20" MappingMode="Absolute" StartPoint="0,0">
            <GradientStop Color="#ABADB3" Offset="0.05"/>
            <GradientStop Color="#E2E3EA" Offset="0.07"/>
            <GradientStop Color="#E3E9EF" Offset="1"/>
        </LinearGradientBrush>
        <Style x:Key="RoutedCornerTextBoxStyle" BasedOn="{x:Null}" TargetType="{x:Type TextBox}">
            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
            <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>
            <Setter Property="BorderBrush" Value="{StaticResource TextBoxBorder}"/>
            <Setter Property="BorderThickness" Value="1"/>
            <Setter Property="Padding" Value="1"/>
            <Setter Property="AllowDrop" Value="true"/>
            <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type TextBox}">
                        <!--<Themes:ListBoxChrome x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderFocused="{TemplateBinding IsKeyboardFocusWithin}" SnapsToDevicePixels="true">
                            <ScrollViewer x:Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                        </Themes:ListBoxChrome>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsEnabled" Value="false">
                                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>-->
                        <Border x:Name="Bd" SnapsToDevicePixels="True"
                                Background="{TemplateBinding Background}"
                                BorderBrush="{TemplateBinding BorderBrush}"
                                BorderThickness="{TemplateBinding BorderThickness}"
                                CornerRadius="15"
                                >
                            <ScrollViewer x:Name="PART_ContentHost" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"></ScrollViewer>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <TextBox x:Name="textBox1" BorderBrush="Red" Margin="10" Height="40" Grid.Row="0" Style="{DynamicResource RoutedCornerTextBoxStyle}"/>
        <TextBox x:Name="textBox2" BorderBrush="Green" Margin="10" Height="40" Grid.Row="1"/>
    </Grid>
</Window>