c#给图片增加阴影库

c#给图片增加阴影库//backgroundLayerbg=image.Layers.Add();bg.Clear(bkcolor);//shadow--layermustbelargerbecauseofblurLayershadow=image.Layers.Add(width+shadowwidth,height+shadowwidth);SolidBrushbrush=newSolidBrush(shadowcolor);sha