/// <summary>
 /// Deprecated Method for adding a new object to the plan_extra EntitySet. Consider using the .Add method of the associated ObjectSet&lt;T&gt; property instead.
 /// </summary>
 public void AddToplan_extra(plan_extra plan_extra)
 {
     base.AddObject("plan_extra", plan_extra);
 }
 /// <summary>
 /// Create a new plan_extra object.
 /// </summary>
 /// <param name="plan_extra_id">Initial value of the plan_extra_id property.</param>
 public static plan_extra Createplan_extra(global::System.Int32 plan_extra_id)
 {
     plan_extra plan_extra = new plan_extra();
     plan_extra.plan_extra_id = plan_extra_id;
     return plan_extra;
 }