控件怎么会显示不全呢?如图:

代码如下:只是简单的布局而已:
<Grid Height="auto">
<Grid Height="150" Margin="0,48,0,121" ShowGridLines="True">
<Border x:Name="questionArea" BorderThickness="1" BorderBrush="Black" Height="auto">
<TextBox Height="20" Width="100" Name="testTextBox" Margin="136,79,277,47" ></TextBox>
</Border>
</Grid>
<Grid Height="60" ShowGridLines="True" Margin="0,215,0,76">
<Border x:Name="answerArea" BorderBrush="Black" BorderThickness="1" Height="auto"></Border>
</Grid>
<Button x:Name="NextButton" Content="下一题" Height="30" Width="90" Margin="102,284,327,27"/>
<Button x:Name="PreviewButton" Content="上一题" Height="30" Width="90" Margin="214,284,215,27"/>
<Button x:Name="RestartButton" Content="全部从来" Height="30" Width="90" Margin="326,284,103,27"/>
</Grid>
怎么回事哦?望赐教~

------解决思路----------------------
我试了下显示的全啊,重启下VS试试?xaml码没看出什么问题。
------解决思路----------------------
调整 Margin