C#WPF使用MaterialDesign 显示带遮罩的对话框

第一步定义对话框

<UserControl
    x:Class="TemplateDemo.Views.Edit.UCEditUser"
    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:local="clr-namespace:TemplateDemo.Views.Edit"
    xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:system="clr-namespace:System;assembly=mscorlib"
    d:DesignHeight="450"
    d:DesignWidth="350"
    Background="Transparent"
    mc:Ignorable="d" Loaded="UserControl_Loaded">
    <Border Background="{DynamicResource TitleBackground}" CornerRadius="5,5,5,5">
        <Border.E