/// <summary>/// 用于附加属性的演示/// </summary>public class MyAttachedProperty{// 获取附加属性public static string GetSubTitle(DependencyObject obj){return (string)obj.GetValue(SubTitleProperty);}// 设置附加属性public static void SetSubTitle(DependencyObject obj, string value){obj.SetValue(SubTitleProperty, value);}// 注册一个附加属性public static readonly DependencyProperty SubTitleProperty =DependencyProperty.RegisterAttached("SubTitle", // 附加属性的名称typeof(string), // 附加属性的数据类型typeof(MyAttachedProperty), // 附加属性所属的类new PropertyMetadata("", PropertyMetadataCallback)); // 指定附加属性的默认值，以及值发生改变时所调用的方法private static void PropertyMetadataCallback(DependencyObject sender, DependencyPropertyChangedEventArgs args){object newValue = args.NewValue; // 发生改变之后的值object oldValue = args.OldValue; // 发生改变之前的值
        }}

<Pagex:Class="XamlDemo.Controls.Basic.AttachedPropertyDemo"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local="using:XamlDemo.Controls.Basic"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"xmlns:myControls="using:MyControls"mc:Ignorable="d"><Grid Background="Transparent"><StackPanel Margin="120 0 0 0"><!--演示如何开发和使用自定义附加属性（本例所用到的自定义控件请参看：MyControls/MyControl.cs）--><myControls:MyControl Background="Blue" BorderBrush="Yellow" BorderThickness="1" Width="100" HorizontalAlignment="Left"Title="{Binding Value, ElementName=slider}" myControls:MyAttachedProperty.SubTitle="{Binding Value, ElementName=slider}" /> //此处就使用附加属性<Slider Name="slider" Width="100" Minimum="0" Maximum="200" IsThumbToolTipEnabled="False"  HorizontalAlignment="Left" /></StackPanel></Grid>
</Page>