WPF window fill the full screen and overlap on the taskbar

 WindowState="Maximized"
 WindowStyle="None"

 

 

 

<Window x:Class="WpfApp409.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"
        xmlns:local="clr-namespace:WpfApp409"
        mc:Ignorable="d"
        WindowState="Maximized"
        WindowStyle="None"
        KeyDown="Window_KeyDown"
        Title="MainWindow" Height="450" Width="800">
    <Window.Background>
        <ImageBrush ImageSource="/Images/1.jpg"/>
    </Window.Background>
    <Grid>
        
    </Grid>
</Window>


//cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApp409
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_KeyDown(object sender, KeyEventArgs e)
        {
            if((Keyboard.Modifiers == ModifierKeys.Control) && e.Key == Key.C)
            {
                var msgResult=MessageBox.Show("Are you sure to close the window?","Close Window",MessageBoxButton.YesNo,
                    MessageBoxImage.Question, MessageBoxResult.Yes);
                if(msgResult == MessageBoxResult.Yes)
                {
                    this.Close();
                }
            }
        }
    }
}