winphone LinearGradientBrush如何取某一位置的颜色值?
村背山 2012-10-24 04:57:20 <Run.Foreground>
<LinearGradientBrush>
<GradientStop Color="Green" Offset="0.0"/>
<GradientStop Color="Purple" Offset="0.25"/>
<GradientStop Color="Orange" Offset="0.5"/>
<GradientStop Color="Blue" Offset="0.75"/>
</LinearGradientBrush>
</Run.Foreground>
如上面代码,我如何取这个渐变颜色过程中某一点的颜色值