WPF，请教控件的Left属性

Question

<Canvas Height="184" Name="canvas1" Width="334">
        <Button Canvas.Left="178" Canvas.Top="96" Height="23" Name="button1" Width="75">
</Canvas>上面在容器中添加一个button按钮，查了下MSDN，Canvas并没有Left、Top属性啊，这是怎么回事呢？

Answer 1

wpf 附加属性
自己baidu

Answer 2

Canvas.Left 附加属性
http://msdn.microsoft.com/zh-cn/library/system.windows.controls.canvas.left.aspx

Answer 3

wpf学习笔记---Canvas
http://www.cnblogs.com/Clingingboy/archive/2007/03/04/663491.html

Answer 4

wp7中对附件属性的学习
http://www.cnblogs.com/fxiaoquan/archive/2012/07/10/2584660.html