WPF TextBox 实现CornerRadius圆角
<Grid Background="Gray" Height="230" Width="229">
<Border CornerRadius="15" BorderBrush="White" BorderThickness="5" Margin="12,23,20,174" Background="White">
<TextBox Width="175" Height="30" Margin="-5,-3,0,0" BorderBrush="White"/>
</Border>
</Grid>