<UserControl x:Class="FullScreen.MainPage"    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"    d:DesignHeight="300" d:DesignWidth="400">    <Grid x:Name="LayoutRoot" Background="White">        <Border HorizontalAlignment="Left" VerticalAlignment="Top" Padding="10" BorderThickness="1" CornerRadius="4" Background="#7F000000">            <StackPanel>                <StackPanel Orientation="Horizontal">                    <TextBlock Text="总CPU占用：" TextWrapping="Wrap" d:LayoutOverrides="Height" Foreground="White"></TextBlock>                    <TextBlock x:Name="txtCPULoad" TextWrapping="Wrap" d:LayoutOverrides="Height" Foreground="White"></TextBlock>                </StackPanel>                <StackPanel Orientation="Horizontal">                    <TextBlock Text="当前CPU占用：" TextWrapping="Wrap" d:LayoutOverrides="Height" Foreground="White"></TextBlock>                    <TextBlock x:Name="txtSLCPULoad" TextWrapping="Wrap" d:LayoutOverrides="Height" Foreground="White"></TextBlock>                </StackPanel>            </StackPanel>        </Border>        <Button Content="正常" Height="47" HorizontalAlignment="Left" Margin="152,123,0,0" Name="btnFull" VerticalAlignment="Top" Width="68" Click="btnFull_Click" />    </Grid></UserControl>

using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;using System.Windows.Threading;namespace FullScreen{    public partial class MainPage : UserControl    {        Analytics myAnalytics;        public MainPage()        {            InitializeComponent();            Loaded += new RoutedEventHandler(MainPage_Loaded);            Application.Current.Host.Content.FullScreenChanged += new EventHandler(Content_FullScreenChanged);        }        void MainPage_Loaded(object sender, RoutedEventArgs e)        {            myAnalytics = new Analytics();            DispatcherTimer timer = new DispatcherTimer();            timer.Interval = TimeSpan.FromSeconds(1);            timer.Tick += new EventHandler(timer_Tick);            timer.Start();        }        void timer_Tick(object sender, EventArgs e)        {            txtCPULoad.Text = myAnalytics.AverageProcessorLoad.ToString();            txtSLCPULoad.Text = myAnalytics.AverageProcessLoad.ToString();        }        void Content_FullScreenChanged(object sender, EventArgs e)        {            var content = Application.Current.Host.Content;            if (content.IsFullScreen)            {                btnFull.Background = new SolidColorBrush(Colors.Yellow);                LayoutRoot.Background = new SolidColorBrush(Colors.Yellow);            }            else            {                btnFull.Background = new SolidColorBrush(Colors.Red);                LayoutRoot.Background = new SolidColorBrush(Colors.Red);            }        }        private void btnFull_Click(object sender, RoutedEventArgs e)        {            var content = Application.Current.Host.Content;            if (!content.IsFullScreen)            {                content.IsFullScreen = !content.IsFullScreen;                btnFull.Content = "还原";            }            else            {                content.IsFullScreen = !content.IsFullScreen;                btnFull.Content = "全屏";            }        }    }}