Adapter Design Pattern in C#

Converts the interface of a class into another interface clients expect. Adapter lets classes work together that couldn’t otherwise because of incompatible interfaces.

This structural code demonstrates the Adapter pattern which maps the interface of one class onto another so that they can work together. These incompatible classes may come from different libraries or frameworks.

using System;

  class MainApp
  {
    static void Main()
    {
      // Create adapter and place a request 
      Target target = new Adapter();
      target.Request();

      // Wait for user 
      Console.Read();
    }
  }

  // "Target" 
  class Target
  {
    public virtual void Request()
    {
      Console.WriteLine("Called Target Request()");
    }
  }

  // "Adapter" 
  class Adapter : Target
  {
    private Adaptee adaptee = new Adaptee();

    public override void Request()
    {
      // Possibly do some other work 
      // and then call SpecificRequest 
      adaptee.SpecificRequest();
    }
  }

  // "Adaptee" 
  class Adaptee
  {
    public void SpecificRequest()
    {
      Console.WriteLine("Called SpecificRequest()");
    }
  }