Adding WPF window without title bar but need to show it when mouse over in xaml file

Hi,
You can achieve this using MouseLeave and MouseEnter events of the WPF Window, But this solution will create a fluctuation when you move cursor near to title bar. So I suggest you to use Mahapps.Metro - a UI toolkit for WPF. It provides extended properties for WPF window. Follow the steps provided in the above link.
And Add two events MouseLeave, MouseEnter to the WPF window. Use the below code in respective events.
MouseEnter event:

private void Window_MouseEnter(object sender, MouseEventArgs e)
{
    this.ShowTitleBar = true;
    this.ShowCloseButton = true;
    this.ShowMinButton = true;
    this.ShowMaxRestoreButton = true;
}

MouseLeave event:

private void Window_MouseEnter(object sender, MouseEventArgs e)
{
    this.ShowTitleBar = false;
    this.ShowCloseButton = false;
    this.ShowMinButton = false;
    this.ShowMaxRestoreButton = false;
}

Now, Add Following properties to the WPF window in xaml,

<Controls:metrowindow x:class="CP1038562.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:Controls="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
        Title="MainWindow" ShowTitleBar="False" ShowMaxRestoreButton="False" ShowMinButton="False" ShowCloseButton="False" Height="350" Width="525" MouseEnter="Window_MouseEnter" BorderBrush="Blue"  BorderThickness="2" MouseLeave="Window_MouseLeave">
</Controls:metrowindow>

Build & Run.