用xaml画的带阴影3D感的圆球

 <StackPanel VerticalAlignment="Center" HorizontalAlignment="Center">

         <Ellipse Width="120" Height="120">

             <Ellipse.Fill>

                 <RadialGradientBrush GradientOrigin="0.25,0.25" RadiusX="0.75" RadiusY="0.75">

                     <RadialGradientBrush.GradientStops>

                         <GradientStop Color="Red" Offset="0" />

                         <GradientStop Color="Orange" Offset="0.65" />

                         <GradientStop Color="Yellow" Offset="0.8" />

                     </RadialGradientBrush.GradientStops>

                 </RadialGradientBrush>

             </Ellipse.Fill>

         </Ellipse>

 </StackPanel>