public void GeoStyle3DSample()
{
    // 实例化一个三维面几何对象 geoRegion3D，并对其进行风格设置
    GeoStyle3D geoStyle3D = new GeoStyle3D();
    geoStyle3D.AltitudeMode = AltitudeMode.Absolute;
    geoStyle3D.BottomAltitude = 200;
    geoStyle3D.ExtendedHeight = 20;
    geoStyle3D.FillForeColor = Color.Blue;
    geoStyle3D.FillMode = FillMode3D.Fill;

    GeoRegion3D geoRegion3D = new GeoRegion3D();
    Point3Ds point3Ds = new Point3Ds();
    Point3D[] point3DArray = {new Point3D(10, 50, 10), new Point3D(150, 50, 20), new Point3D(100, 150, 20), new Point3D(10, 150, 10)};
    point3Ds.AddRange(point3DArray);
    geoRegion3D.AddPart(point3Ds);
    geoRegion3D.Style3D = geoStyle3D;
}