WindowStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
					xmlns:shell="clr-namespace:Microsoft.Windows.Shell;assembly=Microsoft.Windows.Shell"
					xmlns:controls="clr-namespace:WPF.Common.WPF.Controls">

	<Style x:Key="MainWindowStyle" TargetType="{x:Type Window}">
		<Setter Property="shell:WindowChrome.WindowChrome">
			<Setter.Value>
				<shell:WindowChrome
                        ResizeBorderThickness="6"
                        CaptionHeight="30"
                        CornerRadius="0"
                        GlassFrameThickness="0,0,0,1"/>
			</Setter.Value>
		</Setter>
		<Setter Property="Template" Value="{DynamicResource MainWindowControlTemplate}"/>
		<Setter Property="SnapsToDevicePixels" Value="False" />
		<Setter Property="RenderOptions.BitmapScalingMode" Value="HighQuality" />
        <Setter Property="ShowInTaskbar" Value="True" />
    </Style>

    <Style x:Key="UgoWindowStyle" TargetType="{x:Type Window}">
        <Setter Property="shell:WindowChrome.WindowChrome">
            <Setter.Value>
                <shell:WindowChrome
                        ResizeBorderThickness="6"
                        CaptionHeight="30"
                        CornerRadius="0"
                        GlassFrameThickness="0,0,0,1"/>
            </Setter.Value>
        </Setter>
        <Setter Property="Template" Value="{DynamicResource UgoWindowControlTemplate}"/>
        <Setter Property="SnapsToDevicePixels" Value="False" />
        <Setter Property="RenderOptions.BitmapScalingMode" Value="HighQuality" />
        <Setter Property="ShowInTaskbar" Value="True" />
    </Style>

    <Style x:Key="FixedSizeWindowStyle" TargetType="{x:Type Window}">
		<Setter Property="shell:WindowChrome.WindowChrome">
			<Setter.Value>
				<shell:WindowChrome
                        ResizeBorderThickness="0"
                        CaptionHeight="30"
                        CornerRadius="0"
                        GlassFrameThickness="0,0,0,1"/>
			</Setter.Value>
		</Setter>
		<Setter Property="Template" Value="{DynamicResource FixedSizeWindowControlTemplate}"/>
		<Setter Property="SnapsToDevicePixels" Value="False" />
		<Setter Property="RenderOptions.BitmapScalingMode" Value="HighQuality" />
		<Setter Property="ShowInTaskbar" Value="True" />
	</Style>

	<ControlTemplate x:Key="MainWindowControlTemplate" TargetType="{x:Type Window}">
        <Border>
            <Border.Style>
                <Style TargetType="{x:Type Border}">
                    <Setter Property="BorderThickness" Value="0"/>
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding ElementName=Window, Path=WindowState}" Value="Maximized">
                            <Setter Property="BorderThickness" Value="{Binding Source={x:Static shell:SystemParameters2.Current}, Path=WindowResizeBorderThickness}"/>
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </Border.Style>
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="30" />
                    <RowDefinition Height="*"/>
                </Grid.RowDefinitions>

                <!-- Captions Buttons to control the window borderless-->
                <Border Background="{DynamicResource WindowBorder}" Grid.Row="0" />
                <TextBlock Padding="10" Style="{DynamicResource CurrentVersion}" Grid.Row="0" />
                <TextBlock Grid.Row="0" HorizontalAlignment="Center" Text="{Binding RelativeSource={RelativeSource AncestorType={x:Type Window}}, Path=Title}" VerticalAlignment="Center" />
                <controls:CaptionButtons Margin="0,0,10,0" Grid.Row="0" HorizontalAlignment="Right" Type="Full"
                                        Foreground="{DynamicResource CaptionButtonColor}" FontSize="14" MarginButton="0,0,5,0"
                                        VerticalAlignment="Center" shell:WindowChrome.IsHitTestVisibleInChrome="True"/>
                <Border Grid.Row="1" Background="{DynamicResource WindowBackground}">
                    <ContentPresenter Content="{TemplateBinding Content}" />
                </Border>
            </Grid>
        </Border>
    </ControlTemplate>

    <ControlTemplate x:Key="UgoWindowControlTemplate" TargetType="{x:Type Window}">
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="30" />
                <RowDefinition Height="*"/>
            </Grid.RowDefinitions>

            <!-- Captions Buttons to control the window borderless-->
            <Border Background="{DynamicResource WindowBorder}" Grid.Row="0" />
            <TextBlock Padding="10" Style="{DynamicResource CurrentVersion}" Grid.Row="0" />
            <TextBlock Grid.Row="0" HorizontalAlignment="Center" Text="{Binding RelativeSource={RelativeSource AncestorType={x:Type Window}}, Path=Title}" VerticalAlignment="Center" />
            <controls:CaptionButtons Margin="0,0,10,0" Grid.Row="0" HorizontalAlignment="Right" Type="Full"
                                        Foreground="{DynamicResource CaptionButtonColor}" FontSize="14" MarginButton="0,0,5,0"
                                        VerticalAlignment="Center" shell:WindowChrome.IsHitTestVisibleInChrome="True"/>
            <Border Grid.Row="1" Background="{DynamicResource UgoWindowBackground}">
                <ContentPresenter Content="{TemplateBinding Content}" />
            </Border>
        </Grid>
    </ControlTemplate>

    <ControlTemplate x:Key="FixedSizeWindowControlTemplate" TargetType="{x:Type Window}">
        <Border>
            <Border.Style>
                <Style TargetType="{x:Type Border}">
                    <Setter Property="BorderThickness" Value="0"/>
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding ElementName=Window, Path=WindowState}" Value="Maximized">
                            <Setter Property="BorderThickness" Value="{Binding Source={x:Static shell:SystemParameters2.Current}, Path=WindowResizeBorderThickness}"/>
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </Border.Style>
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="30" />
                    <RowDefinition Height="*"/>
                </Grid.RowDefinitions>

                <!-- Captions Buttons to control the window borderless-->
                <Border Background="{DynamicResource WindowBorder}" Grid.Row="0" />
                <TextBlock Padding="10" Style="{DynamicResource CurrentVersion}" Grid.Row="0" />
                <TextBlock Grid.Row="0" HorizontalAlignment="Center" Text="{Binding RelativeSource={RelativeSource AncestorType={x:Type Window}}, Path=Title}" VerticalAlignment="Center" />
                <controls:CaptionButtons Margin="0,0,10,0" Grid.Row="0" HorizontalAlignment="Right" Type="ReduceClose"
                                        Foreground="{DynamicResource CaptionButtonColor}" FontSize="14" MarginButton="0,0,5,0"
                                        VerticalAlignment="Center" shell:WindowChrome.IsHitTestVisibleInChrome="True" />
                <Border Grid.Row="1" Background="{DynamicResource WindowBackground}">
                    <ContentPresenter Content="{TemplateBinding Content}" />
                </Border>
            </Grid>
        </Border>
        
	</ControlTemplate>
</ResourceDictionary>