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Template Method Pattern

using System;   public abstract class Window   {     public abstract void  PositionLabel();            public void SetupWindowFace()     {       this.PositionLabel();     }     public Window(){;}        }   public class WindowDeluxe: Window   {     public override void  PositionLabel()     {Console.WriteLine("center.");}          public WindowDeluxe(){;}   }   public class WindowStandard:Window   {     public override void PositionLabel(){;}     public WindowStandard()  {;}        }   class Client   {     static void Main(string[] args)     {       Window delWindow = new WindowDeluxe();       delWindow.SetupWindowFace();       Window stdWindow = new WindowStandard();       stdWindow.SetupWindowFace();     }   }