Window without border in Windows 7

Question

I try to remove the border of a WPF Window. In Window XP worked fine. In Windows 7 the title bar disappear (this is ok), but the window border didn't disappear: this is the problem.

The question: what I must to change to remove the border?

This is the XAML code:

<Window x:Class="WpfApplication1.MainWindow"
 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 Title="MainWindow" Height="350" Width="525" WindowStyle="None" >
 <Grid>
 <TextBlock Height="261" HorizontalAlignment="Left" Margin="55,29,0,0" Name="textBlock1" Text="Some text" VerticalAlignment="Top" Width="419" FontSize="36" />
 </Grid>
</Window>

I attached a print screen bellow: enter image description here

Answer 1

Set ResizeMode to NoResize:

<Window ... WindowStyle="None" ResizeMode="NoResize">

Answer 2

You can set AllowsTransparency="True" and the border will disappear