/// <summary>
 /// 创建新的 City 对象。
 /// </summary>
 /// <param name="cityID">CityID 属性的初始值。</param>
 /// <param name="cityName">CityName 属性的初始值。</param>
 /// <param name="isActive">IsActive 属性的初始值。</param>
 public static City CreateCity(global::System.Guid cityID, global::System.String cityName, global::System.Boolean isActive)
 {
     City city = new City();
     city.CityID = cityID;
     city.CityName = cityName;
     city.IsActive = isActive;
     return city;
 }
 /// <summary>
 /// 用于向 City EntitySet 添加新对象的方法,已弃用。请考虑改用关联的 ObjectSet&lt;T&gt; 属性的 .Add 方法。
 /// </summary>
 public void AddToCity(City city)
 {
     base.AddObject("City", city);
 }