C＃WPF - 窗口中的黑线

Question

在我的窗口中有一条小黑线。 为什么呢？

<Window x:Class="WpfPortOfTestingCamera.InputSelection"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="InputSelection" WindowStartupLocation="CenterOwner" ResizeMode="NoResize" ShowInTaskbar="False" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" SizeToContent="WidthAndHeight" d:DesignWidth="280" d:DesignHeight="206">

        <StackPanel HorizontalAlignment="Center" Name="stackPanel1" VerticalAlignment="Top" Margin="10" MaxWidth="500">
            <GroupBox Header="Select Camera" HorizontalAlignment="Center" VerticalAlignment="Center">
                <ComboBox Height="23" Name="comboBox1" HorizontalAlignment="Center" VerticalAlignment="Center" MinWidth="120" />
            </GroupBox>
            <Button Content="OK" Name="ButtonOK" IsDefault="True" Click="ButtonOK_Click" />
        </StackPanel>
</Window>

Answer 1

当设置内容字符串时，当窗口调整为组合框的宽度时，似乎是一个渲染工件。

如果添加属性SnapsToDevicePixels =＆＃34; True＆＃34;到了Window-tag，黑线消失了。