wpf - 如何从WPF中的文本框删除边框？

Question

当单击或悬停这些边框时，它们会出现，并且直到失去焦点后才会消失。
在所有四个侧面上都有边框，但是由于它嵌入在较短的网格中，因此顶部和底部的边框不可见。
如何删除这些边界？
如果可能，请提供示例。

XAML:

<Border x:Name="SearchBorder" BorderThickness="1" HorizontalAlignment="Left" Height="40" Margin="672,34,0,0" VerticalAlignment="Top" Width="355" Background="#3F000000">
        <Border.BorderBrush>
            <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                <GradientStop Color="#4C000000" Offset="0"/>
                <GradientStop Color="#3FFFFFFF" Offset="1"/>
            </LinearGradientBrush>
        </Border.BorderBrush>
        <Grid>
            <TextBox x:Name="SearchBox" HorizontalAlignment="Left" Height="40" Width="296" Margin="10,0,0,0" TextWrapping="Wrap" VerticalAlignment="Center"  SelectionBrush="Black" Background="#00000000" Foreground="#FF5B5B5B" FontSize="25" FontFamily="Segoe UI Light" BorderBrush="#00000000" CaretBrush="#FF6C6C6C"/>
            <TextBlock HorizontalAlignment="Left" Height="23" Margin="320,0,0,0" TextWrapping="Wrap" Text="&#xF002;" VerticalAlignment="Center" Width="21" FontFamily="FontAwesome" FontSize="25" Foreground="#FF919191"/>
            <Rectangle HorizontalAlignment="Left" Margin="311,-2,0,0" Width="1">
                <Rectangle.Stroke>
                    <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                        <GradientStop Color="#3F404040" Offset="0"/>
                        <GradientStop Color="#3F686868" Offset="1"/>
                        <GradientStop Color="#59DADADA" Offset="0.502"/>
                    </LinearGradientBrush>
                </Rectangle.Stroke>
            </Rectangle>
        </Grid>
    </Border>

Answer 1

试试BorderThickness="0"

<TextBox x:Name="SearchBox" BorderThickness="0" HorizontalAlignment="Left" Height="40" Width="296" Margin="10,0,0,0" TextWrapping="Wrap" VerticalAlignment="Center"  SelectionBrush="Black" Background="#00000000" Foreground="#FF5B5B5B" FontSize="25" FontFamily="Segoe UI Light" BorderBrush="#00000000" CaretBrush="#FF6C6C6C"/>