MainWindow.xaml.cs

using RecodedMusicPlayer.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
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.Interop;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

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

            //To prevent convering Windows Taskbar
            MaxHeight = SystemParameters.MaximizedPrimaryScreenHeight;
            MaxWidth = SystemParameters.MaximizedPrimaryScreenWidth;

        }

        //Adding border thickness to window when state is Maximized
        protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
        {
            base.OnPropertyChanged(e);

            if (this.WindowState == System.Windows.WindowState.Normal)
                BorderThickness = new Thickness(0);

            else if (this.WindowState == System.Windows.WindowState.Maximized)
                BorderThickness = new Thickness(7);
        }

    }
}