<Window x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="WPF" Height="100" Width="180">
<Window.Resources>
<ControlTemplate x:Key="labelTemplate" TargetType="{x:Type Label}">
<Border x:Name="border" CornerRadius="4" BorderThickness="3" BorderBrush="DarkGray" Background="{TemplateBinding Property=Background}">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Border>
</ControlTemplate>
</Window.Resources>
<Grid>
<Label Width="100" Height="24"
Margin="4" Content="Custom Label"
Template="{StaticResource labelTemplate}"
Background="Red"/>
</Grid>
</Window>
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