gistfile1.txt

<metro:MetroWindow x:Class="MainWindow"
                   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                   xmlns:Routing="clr-namespace:ReactiveUI.Routing;assembly=ReactiveUI.Routing" 
                   xmlns:metro="clr-namespace:MahApps.Metro.Controls;assembly=MahApps.Metro"
                   xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
                   xmlns:behaviours="clr-namespace:MahApps.Metro.Behaviours;assembly=MahApps.Metro"                           AllowsTransparency="False">
    <i:Interaction.Behaviors>
        <behaviours:BorderlessWindowBehavior ResizeWithGrip="True" EnableDWMDropShadow="True" />
    </i:Interaction.Behaviors>
</metro:MetroWindow>