Ответ 1
ИЗМЕНИТЬ
быстрый запуск и MetroWindow
help теперь обновлены (04.09.2014).
Снимки/примеры в quickstart не совсем обновлены.
У вас может быть рамка
<controls:MetroWindow x:Class="MahApps.Metro.Simple.Demo.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:controls="http://metro.mahapps.com/winfx/xaml/controls"
Title="MainWindow"
Height="200"
Width="600"
BorderBrush="{DynamicResource AccentColorBrush}"
BorderThickness="1"
WindowStartupLocation="CenterScreen">
</controls:MetroWindow>
или граница свечения
<controls:MetroWindow x:Class="MahApps.Metro.Simple.Demo.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:controls="http://metro.mahapps.com/winfx/xaml/controls"
Title="MainWindow"
Height="200"
Width="600"
GlowBrush="{DynamicResource AccentColorBrush}"
WindowStartupLocation="CenterScreen">
</controls:MetroWindow>
или тень
<controls:MetroWindow x:Class="MahApps.Metro.Simple.Demo.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:controls="http://metro.mahapps.com/winfx/xaml/controls"
xmlns:behaviours="http://metro.mahapps.com/winfx/xaml/shared"
Title="MainWindow"
Height="200"
Width="600"
ResizeMode="CanResizeWithGrip"
WindowTransitionsEnabled="False"
WindowStartupLocation="CenterScreen">
<i:Interaction.Behaviors>
<behaviours:BorderlessWindowBehavior AllowsTransparency="False"
EnableDWMDropShadow="True" />
<behaviours:WindowsSettingBehaviour />
<behaviours:GlowWindowBehavior />
</i:Interaction.Behaviors>
</controls:MetroWindow>
Обновление
EnableDWMDropShadow
был перенесен на MetroWindow
в версии 0.13 alpha (последняя версия)
<controls:MetroWindow x:Class="MahApps.Metro.Simple.Demo.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:controls="http://metro.mahapps.com/winfx/xaml/controls"
xmlns:behaviours="http://metro.mahapps.com/winfx/xaml/shared"
Title="MainWindow"
Height="200"
Width="600"
EnableDWMDropShadow="True"
ResizeMode="CanResizeWithGrip"
WindowTransitionsEnabled="False"
WindowStartupLocation="CenterScreen">
</controls:MetroWindow>
надеюсь, что поможет