Canvas
<pre><code class="language-csharp"> &lt;!--Panel.ZIndex使控件显示在最前--&gt;
&lt;Canvas&gt;
&lt;Button Canvas.Left=&quot;200&quot; Content=&quot;1&quot; Height=&quot;40&quot; Width=&quot;200&quot;&gt;&lt;/Button&gt;
&lt;Button Canvas.Top=&quot;40&quot; Content=&quot;2&quot; Height=&quot;40&quot; Width=&quot;200&quot;&gt;&lt;/Button&gt;
&lt;Button Canvas.Right=&quot;60&quot; Content=&quot;3&quot; Height=&quot;40&quot; Width=&quot;200&quot;&gt;&lt;/Button&gt;
&lt;Button Canvas.Bottom=&quot;100&quot; Canvas.Right=&quot;60&quot; Content=&quot;4&quot; Height=&quot;40&quot; Width=&quot;200&quot;&gt;&lt;/Button&gt;
&lt;/Canvas&gt;</code></pre>