如何 创建一个model对象保存到LIST集合里面并取出来

 /// <summary>
    /// 缓存客服集合信息
    /// </summary>
    public class model
    {
        /// <summary>
        /// 客户ID
        /// </summary>
        public  string CustID { get; set; }
        /// 在线状态
        /// </summary>
        public  bool IsOnlineLogin { get; set; }
        /// <summary>
        /// 所属机构
        /// </summary>
        public  string SubsidiaryOrgan { get; set; }
    }

//给model对象的属性赋值

Model  a= new Model  ();
a.CustID = "";
a.IsOnlineLogin = false;
a.SubsidiaryOrgan = "";

//定义list<实体类>

List<ServiceGather> ServiceGatherList = new List<ServiceGather>();

把model实体类属性的值赋值给list
ServiceGatherList.Add(ServiceGatherModel);

//取值，对list所有操作 必须循环
foreach (var item in ServiceGatherList)
{
 string asdasd = item.CustID;
}