class Client static void Main Abstraction abstraction abstraction new

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class Client
{
static void Main()
{
Abstraction abstraction;
abstraction = new RefinedAbstraction(new ConcreteImplementorA());
abstraction.Operation();
abstraction.Implementor=new ConcreteImplementorB();
abstraction.Operation();
}
}
abstract class Abstraction
{
protected Implementor implementor;
public Implementor Implementor
{
set { implementor = value; }
}
public Abstraction(Implementor imp)
{
implementor = imp;
}
public virtual void Operation()
{
implementor.OperationImp();
}
}
abstract class Implementor
{
public abstract void OperationImp();
}
class RefinedAbstraction : Abstraction
{
public RefinedAbstraction(Implementor imp)
: base(imp)
{}
public override void Operation()
{
}
}
class ConcreteImplementorA : Implementor
{
public override void OperationImp()
{
}
}
class ConcreteImplementorB : Implementor
{
public override void OperationImp()
{
}
}