动态添加DataColumn设置它的位置

DataTable dt = Phone_Info_ManagerBLL.GetAllPhone("");
            
            dt.Columns.Add("_columns");
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                dt.Rows[i]["IsName"] = Convert.ToBoolean(dt.Rows[i]["属性1"]) == true ? "有" : "无";
            }
            dt.Columns["_columns"].SetOrdinal(1);