//Visual Basic 2008/2010 Collecties - Inleiding Object Oriented Programming
public class Rectangle {
    private int m_Height;
    private int m_Width;
    public virtual int Height {
        get {
            Height = this.m_Height;
        }
        set {
            this.m_Height = value;
        }
    }
    public virtual int Width {
        get {
            Width = this.m_Width;
        }
        set {
            this.m_Width = value;
        }
    }
    public virtual void GetArea() {
        GetArea = (Height * Width);
    }
}
public class Rectangles {
    private Rectangle[] m_Items;
    private int m_Count;
    public virtual Rectangle this[int index] {
        get {
            Item = this.m_Items(index);
        }
    }
    public virtual int Count {
        get {
            Count = this.m_Count;
        }
    }
    public virtual void Add(Rectangle rectangle) {
        this.m_Items(Count) = rectangle;
        this.m_Count += new System.EventHandler(1);
    }
    public virtual void RemoveAt(int index) {
        this.m_Items(itemIndex) = this.m_Items((itemIndex + 1));
        this.m_Count = 1;
    }
    public virtual void GetTotalArea() {
        for (System.Collections.IEnumerator _it1 = this.m_Items.GetEnumerator(); _it1.MoveNext(); ) {
            Rectangle item = ((Rectangle)(_it1.Current));

            this.GetTotalArea += new System.EventHandler(item.GetArea());
        }
    }
}
public class Exercise1Solution {
    void Main() {
        Rectangle rectangle1 = new Rectangle();
        rectangle1.Height = 1;
        rectangle1.Width = 2;
        Console.WriteLine(rectangle1.GetArea());
        Rectangle rectangle2 = new Rectangle();
        rectangle2.Height = 3;
        rectangle2.Width = 4;
        Console.WriteLine(rectangle2.GetArea());
        Rectangles rectangles1 = new Rectangles();
        rectangles1.Add(rectangle1);
        rectangles1.Add(rectangle2);
        Console.Write((this.rectangles1(index).GetArea() + " "));
        Console.WriteLine();
        Console.WriteLine(rectangles1.GetTotalArea());
        rectangles1.RemoveAt(1);
        Console.Write((this.rectangles1(index).GetArea() + " "));
        Console.WriteLine();
        Console.WriteLine(rectangles1.GetTotalArea());
        Console.ReadLine();
    }
}
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