Patterns in SOME –State

Code in C#:   namespace State_DesignPattern {      using System;        abstract class State      {          protected string strStatename;                  abstract public void Pour();          // do something state-specific here      }        class OpenedState : State      {                 public OpenedState ()          {               strStatename = "Opened";          }          override public void Pour()          {               Console.WriteLine("...pouring...");               Console.WriteLine("...pouring...");               Console.WriteLine("...pouring...");          }      }           class ClosedState : State      {                 public ClosedState()          {               strStatename = "Closed";          }          override public void Pour()          {               Console.WriteLine("ERROR - bottle is closed - cannot pour");          }      }        class ContextColaBottle      {          public enum BottleStateSetting          {               Closed,               Opened          };            // If teh state classes had large amounts of instance data,          // we could dynamically create them as needed - if this demo          // they are tiny, so we just create them as data members          OpenedState openedState = new OpenedState();          ClosedState closedState = new ClosedState();            public ContextColaBottle ()          {               // Initialize to closed               CurrentState = closedState;          }            private State CurrentState;                   public void SetState(BottleStateSetting newState)          {               if (newState == BottleStateSetting.Closed)               {                    CurrentState = closedState;               }               else               {                    CurrentState = openedState;               }          }            public void Pour()          {               CurrentState.Pour();          }         }        ///<summary>      ///    Summary description for Client.      ///</summary>      public class Client      {          public static int Main(string[] args)          {               ContextColaBottle contextColaBottle = new ContextColaBottle();                 Console.WriteLine("initial state is closed");                 Console.WriteLine("Now trying to pour");               contextColaBottle.Pour();                 Console.WriteLine("Open bottle");               contextColaBottle.SetState(ContextColaBottle.BottleStateSetting.Opened);                 Console.WriteLine("Try to pour again");               contextColaBottle.Pour();                 return 0;          }      } }     Code in SOME:    AState        string m_strStatename        a_Pour()   COpenedState : AState        (string m_strStatename)                      /* member m_strStatename should not be defined again becuase it has already been defined by its father*/        o_Pour()   CClosedState : AState        ()        o_Pour()   CContextColaBottle ->AState[_CurrentState] ->CCOpenedState[c_openedState.()] ->CClosedState[c_closedState.()]                   ()                                 SetState(string)                                                Pour()   CClient        main          CClient.main {        CContextColaBottle contextColaBottle.()        {               _CurrentState = _closedState;        };          <% Console.WriteLine("initial state is closed"); %>          <% Console.WriteLine("Now trying to pour"); %>        contextColaBottle.Pour()        {               _CurrentState.Pour();                                //override function should not be unfolded in this situation        };          <% Console.WriteLine("Open bottle"); %>        contextColaBottle.SetState(newState["CContextColaBottle.BottleStateSetting.Opened"])                 //alias for parameter, all the content between [] will be reserved        {                      <%                      if (newState == BottleStateSetting.Closed)                      {                             _CurrentState = _closedState;                      }                      else                      {                             _CurrentState = _openedState;                      }                      %>         };          <% Console.WriteLine("Try to pour again");%>        contextColaBottle.Pour(); }