Display Current Date and Time: binding the DateTime.Now to Label
<Label xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="48" Content="{x:Static s:DateTime.Now}" Foreground="{x:Static SystemColors.ActiveCaptionBrush}" />