ClockMonitor.xaml

<Window x:Class="SimpleUsefulTimer.ClockMonitor"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:SimpleUsefulTimer"
        mc:Ignorable="d"
        SizeToContent="WidthAndHeight"
        Name="ClockMonitorWindow" Topmost="True" Title="Clock" DataContext="{Binding RelativeSource={RelativeSource AncestorType=local:ClockControl}}"  AllowsTransparency="True" Background="Transparent"  WindowStyle="None" Closing="ClockMonitorWindow_Closing" MouseRightButtonUp="ClockMonitorWindow_MouseRightButtonUp" MouseDown="ClockMonitorWindow_MouseDown">
    <StackPanel Name="ClockViewContainer" Orientation="Horizontal" Background="{Binding ClockBackground}">
        <TextBlock Background="{Binding ClockBackground}"
        Name="ClockDisplay" 
        Text="{Binding Clock, UpdateSourceTrigger=PropertyChanged}" 
        FontFamily="{Binding ClockFont}"  
        FontSize="{Binding ClockFontSize, Mode=TwoWay}" 
        FontWeight="Bold"
        Foreground="{Binding ClockForeground, Mode=OneWay}"
        >
        </TextBlock>
    </StackPanel>
</Window>