示例代码：
// Factory Method
namespace FactoryMethod_DesignPattern
{
using System;
// These two classes could be part of a framework,
// which we will call DP
// ===============================================
class DPDocument
{
}
abstract class DPApplication
{
protected DPDocument doc;
abstract public void CreateDocument();
public void ConstructObjects()
{
// Create objects as needed
// . . .
// including document
CreateDocument();
}
abstract public void Dump();
}
// These two classes could be part of an application
// =================================================
class MyApplication : DPApplication
{
override public void CreateDocument()
{
doc = new MyDocument();
}
override public void Dump()
{
Console.WriteLine("MyApplication exists");
}
}
class MyDocument : DPDocument
{
}
/// <summary>
/// Summary description for Client.
/// </summary>
public class Client
{
public static int Main(string[] args)
{
MyApplication myApplication = new MyApplication();
myApplication.ConstructObjects();
myApplication.Dump();
return 0;
}
}
}
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