1: <!--方法一-->

2: <Button Margin="5">

3: <Button.Content>

4: <Image Source="Images/DVD.png" Width="48" Height="48" />

5: </Button.Content>

6: </Button> 

<!--方法二-->

9: <Button Margin="5">

10: <Image Source="Images/DVD.png" Width="48" Height="48" />

11: </Button>

13: <!--如果是字符串，或者是数组绑定、资源引用还可以-->

14: <Button Margin="5" Content="Button Text" />

另外，还可以使用代码来为ContentControl指定相应的Content属性，如：

1: TextBlock date = new TextBlock();

2: date.Text = DateTime.Now.ToString("yyyy-MM-dd");

4: TextBlock time = new TextBlock();

5: time.Text = DateTime.Now.ToString("hh:mm:ss");

7: StackPanel panel = new StackPanel();

8: panel.Children.Add(date);

9: panel.Children.Add(time);

11: btn.Content = panel;