WPF，怎么创建一个实现Button的类的？
VS中创建一个自定义控件MyButton，刚开始是下面的这样的：
public partial class MyButton : UserControl
{
public MyButton()
{
InitializeComponent();
}
}
<UserControl x:Class="WPF熊俊.MyButton"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<Grid>
</Grid>
</UserControl>
