Make my wpf application Full Screen (Cover taskbar and title bar of window)

Question

I would like to make my application such that it can maximize to full screen means it hide the windows task bar and the title bar as well. And it should triggered by a button.

I am trying to develop the my application window like this.

Add my code snippet below

 <controls:MetroWindow x:Class="EDUI.MainWindow"
            xmlns:controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:local="clr-namespace:EDiscoveryCore;assembly=EDiscoveryCore"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            Title="eDi"  BorderBrush="SkyBlue" BorderThickness="2" Height="999" Width="1071" WindowState="Maximized" x:Name="MainWindows">

Answer 1

You need to set the WindowStyle to none as well as WindowState to Maximized

<Window ...    
 WindowStyle="None"   
 WindowState="Maximized">

Answer 2

You need to set the ResizeMode to NoResize and WindowState to Maximized

  <Window ...    
    ResizeMode="NoResize" WindowState="Maximized">