winodws 8中的每一个效果多事很炫的 一起加入进来吧
<Rectangle Width="1000" Height="800" Name="Rec">
<Rectangle.Fill>
<LinearGradientBrush StartPoint="0,0" EndPoint="1,1">
<GradientStop Color="Yellow" Offset="0.0"/>
<GradientStop Color="Red" Offset="0.25"/>
<GradientStop Color="Blue" Offset="0.75"/>
<GradientStop Color="LimeGreen" Offset="1.0"/>
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>