using System;

public class Program

{

    public static void Main()

    {

        Adapter a = new Adapter();

        Customer charlie = a.GetByID("Charlie");

        Console.WriteLine(charlie);

    }

}

// This adapter has a BO, which has a GetByID function

// In the adapter we also have a function called GetByID which just calls the BO.GetByID()

public class Adapter

{

    BO internalBO;

    public Adapter()

    {

        internalBO = new BO();

    }

    //This is the adpter's "GetByID" which doesn't do much other than call the BO.GetByID()

    public Customer GetByID(string s)

    {

        Customer c = internalBO.GetByID(s);

        return c;

    }

}

​

public class BO

{

    //This is the real GetByID where the work gets done

    public Customer GetByID(string s)

    {

        Customer c = new Customer();

        c.id=s;

        return c;

    }

}

​

public class Customer

{

    public string id {get;set;}

    public override string ToString()

    {

        return id;

    }

}