ApolloNewWorld/FurnaceNewWorld/UIModules/SummaryModule/Controls/Header_Content.xaml

<UserControl x:Class="SummaryModule.Controls.Header_Content"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:SummaryModule.Controls"
             mc:Ignorable="d" 
             x:Name="This"
             d:DesignHeight="450" d:DesignWidth="800">
    <UserControl.Resources>
        <ResourceDictionary >
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="/UICommon;component/Resources.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </UserControl.Resources>
    <Border BorderBrush="{StaticResource DarkBorderColor}" BorderThickness="0.5" CornerRadius="4" MinHeight="32">

        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition/>
                <ColumnDefinition/>
            </Grid.ColumnDefinitions>
            <Border Background="#e6f4ff" CornerRadius="4,0,0,4">
                <ContentPresenter TextElement.FontSize="14" TextElement.Foreground="{StaticResource ThemeColor}" VerticalAlignment="Center" Margin="8,0,0,0" Content="{Binding ElementName=This, Path=Header}"></ContentPresenter>
                <!--<TextBlock Foreground="{StaticResource ThemeColor}" FontSize="14" VerticalAlignment="Center" Margin="8,0,0,0" Text="{Binding ElementName=This, Path=Header}"/>-->
            </Border>
            <Border Grid.Column="1" Background="White" CornerRadius="0,4,4,0" BorderBrush="{StaticResource DarkBorderColor}" BorderThickness="0.5,0,0,0">
                <ContentPresenter TextElement.FontSize="14" TextElement.Foreground="{StaticResource ThemeColor}" VerticalAlignment="Center" Margin="{Binding ElementName=This, Path=ContentMargin}" Content="{Binding ElementName=This, Path=DisplayContent}"></ContentPresenter>
            </Border>
        </Grid>
    </Border>
</UserControl>