设置实体为选中状态

/// <summary>
/// 设置实体为选中状态
/// </summary>
private void SetPickfirstSet(Entity ent)
{
    Editor ed = doc.Editor;
    ObjectIdCollection objs = new ObjectIdCollection();
    objs.Add(ent.ObjectId);
    ed.SetImpliedSelection(new ObjectId[0]);
    ObjectId[] ids = new ObjectId[objs.Count];
    objs.CopyTo(ids, 0);
    ed.SetImpliedSelection(ids);
}