WPF UserControl with a nice looking title line.

Window.xaml

<UserControl x:Class="OS.NET.Widgets.Window"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Height="300" Width="300">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="24" />
            <RowDefinition />
        </Grid.RowDefinitions>
        
        <Border Grid.Row="0" Grid.Column="0" BorderBrush="Black" CornerRadius="4,4,0,0">
            <Border.Background>
                <LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
                    <GradientStop Color="LightGreen" Offset="0" />
                    <GradientStop Color="DarkGreen" Offset="1" />
                </LinearGradientBrush>
            </Border.Background>
            
            <Grid>
                <TextBlock Margin="4" VerticalAlignment="Center" Foreground="White" Text="Window Title">
                    <TextBlock.BitmapEffect>
                        <DropShadowBitmapEffect Color="Black" />
                    </TextBlock.BitmapEffect>
                </TextBlock>
            </Grid>
        </Border>

        <ContentPresenter />
    </Grid>
</UserControl>