WPF模糊内容方面变得透明

问题描述

我一直有模糊的问题，对内容（网格，堆叠面板等）应用模糊对父背景（或图像）变得透明，我需要做什么来阻止这样的事情？

I have long problem with blur, applying blur to content(grid, stackpanel, etc) sides become transparent to parent background(or image), what I need to do prevent from such thing?

示例以显示我的问题：

<Window x:Class="sampleWPF.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"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800"
        Background="Green">
    <Grid Background="Yellow">
        <Grid.Effect>
            <BlurEffect Radius="50"/>
        </Grid.Effect>
    </Grid>
</Window>

正如你可以看到窗口有绿色背景，网格有黄色背景，所以模糊网格有绿色边，我需要做什么来防止这样的东西？
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As you can see window has green background, and grid has yellow background, so blurred grid has green sides, what I need todo to prevent from such thing?

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