How to create a WPF Window without a border that can be resized via a grip only?

If you set the AllowsTransparency property on the Window (even without setting any transparency values) the border disappears and you can only resize via the grip. <Window xmlns=”http://schemas.microsoft.com/winfx/2006/xaml/presentation” xmlns:x=”http://schemas.microsoft.com/winfx/2006/xaml” Width=”640″ Height=”480″ WindowStyle=”None” AllowsTransparency=”True” ResizeMode=”CanResizeWithGrip”> <!– Content –> </Window> Result looks like: