设计模式系列13：模板方法模式（Template Method Pattern）

using System;
 
namespace DoFactory.GangOfFour.Template.Structural
{
  /// <summary>

  /// MainApp startup class for Real-World 

  /// Template Design Pattern.

  /// </summary>

  class MainApp

  {
    /// <summary>

    /// Entry point into console application.

    /// </summary>

    static void Main()
    {
      AbstractClass aA = new ConcreteClassA();
      aA.TemplateMethod();
 
      AbstractClass aB = new ConcreteClassB();
      aB.TemplateMethod();
 
      // Wait for user

      Console.ReadKey();
    }
  }
 
  /// <summary>

  /// The ‘AbstractClass‘ abstract class

  /// </summary>

  abstract class AbstractClass

  {
    public abstract void PrimitiveOperation1();
    public abstract void PrimitiveOperation2();
 
    // The "Template method"

    public void TemplateMethod()
    {
      PrimitiveOperation1();
      PrimitiveOperation2();
      Console.WriteLine("");
    }
  }
 
  /// <summary>

  /// A ‘ConcreteClass‘ class

  /// </summary>

  class ConcreteClassA : AbstractClass

  {
    public override void PrimitiveOperation1()
    {
      Console.WriteLine("ConcreteClassA.PrimitiveOperation1()");
    }
    public override void PrimitiveOperation2()
    {
      Console.WriteLine("ConcreteClassA.PrimitiveOperation2()");
    }
  }
 
  /// <summary>

  /// A ‘ConcreteClass‘ class

  /// </summary>

  class ConcreteClassB : AbstractClass

  {
    public override void PrimitiveOperation1()
    {
      Console.WriteLine("ConcreteClassB.PrimitiveOperation1()");
    }
    public override void PrimitiveOperation2()
    {
      Console.WriteLine("ConcreteClassB.PrimitiveOperation2()");
    }
  }
}