答案 0 :(得分:1)
查找MultiSelectSquare
Border
控件。
下面我给了红色复选框的背景颜色
<Border x:Name="MultiSelectSquare"
Background="Red" BorderThickness="2" BorderBrush="Black"
Width="20"
Height="20"
Margin="0,2,2,0"
VerticalAlignment="Top"
HorizontalAlignment="Right"
Visibility="Collapsed" >