public void GeoPyramidSample()
{
    // 实例化四棱锥几何对象，并对其进行设置
    GeoPyramid geoPyramid = new GeoPyramid();
    geoPyramid.ID = 20;
    geoPyramid.Position = new Point3D(100, 100, 100);
    geoPyramid.BottomSize = new Size2D(100, 50);
    geoPyramid.Height = 100.0;

    // 将四棱锥几何对象添加到几何要素中，假设返回的三维图层为 KML 图层
    SceneControl sceneControl = new SceneControl();
    Layer3D layer3D = sceneControl.Scene.Layers[0];
    Feature3Ds feature3Ds = layer3D.Features;
    feature3Ds.Add(geoPyramid);

    // 释放资源
    geoPyramid.Dispose();
    feature3Ds.Dispose();
    sceneControl.Dispose();
}