看看http://msdn.microsoft.com/en-us/library/system.windows.controls.combobox% 28v = vs.110％29.aspx [ ^ ]，用于 BorderBrush 和 BorderThickness 。或使用 ControlTemplate [ ^ ]。

<ComboBox HorizontalAlignment="Left" Margin="71,19,0,0" VerticalAlignment="Top" Width="92" Height="29" RenderTransformOrigin="0.918,0.497">


</ComboBox>

Take a look at http://msdn.microsoft.com/en-us/library/system.windows.controls.combobox%28v=vs.110%29.aspx[^], for BorderBrush and BorderThickness. Or use a ControlTemplate[^].