using System.Collections;
public abstract class Shape
{
public abstract void Draw();
}
public class Rectangle : Shape
{
public override void Draw()
{
System.Console.WriteLine( "Rectangle.Draw" );
}
}
public class Circle : Shape
{
public override void Draw()
{
System.Console.WriteLine( "Circle.Draw" );
}
}
public class ShapeList
{
private ArrayList shapes;
public ShapeList()
{
shapes = new ArrayList();
}
public int Count
{
get
{
return shapes.Count;
}
}
public Shape this[ int index ]
{
get
{
return (Shape) shapes[index];
}
}
public void Add( Shape shape )
{
shapes.Add( shape );
}
}
public class MainClass
{
static void Main()
{
ShapeList drawing = new ShapeList();
drawing.Add( new Rectangle() );
drawing.Add( new Circle() );
for( int i = 0; i < drawing.Count; ++i ) {
Shape shape = drawing[i];
shape.Draw();
}
}
}
Rectangle.Draw
Circle.Draw