【MSCE C#】从ElementAgenda获取Geometry

各位老师我在获取到各个元素的ID之后想要读取其Geometry属性，请问有没有什么方法可以呢

ElementAgenda agenda = new ElementAgenda();
SelectionSetManager.BuildAgenda(ref agenda);
string result = "The selected elements:\n";
for (uint i = 0; i < agenda.GetCount(); i++)
{
    result = result + i + 1 + ": ElementId = " + agenda.GetEntry(i).ElementId + ", Element type = " + agenda.GetEntry(i).ElementType + "\n";//将元素ID与元素类型信息写入字符串中
}