נתונות המחלקות A, B, C הבאות:

public class A
{
    private static int countA = 0;
    protected int x;
    public A()
      {
            countA++;
            this.x = 0;
    }
    public A(int x)
      {
            countA++;
            this.x = x;
    }
    public override string ToString()
      {
            return "A:"+this.x;
    }
    public virtual int DoIt(int z)
      {
            return this.x * z;
    }
    public static int GetCount(){ return countA;  }
}// end of class A

public class B : A
{
    protected int y;
    private static int countB = 0;
    public B(int y)
      {
            this.y = y;
            countB++;
    }
    public B(int x, int y):base(x)
      {
            countB++;
            this.y = y;
    }
    public override string ToString()
      {
        return "B:"+base.ToString ()+":"+this.y;
    }
    public static new int GetCount(){return countB;}
    public override int DoIt(int z)
      {
            return base.DoIt(z) + this.y;
     }
} //end of class B
public class C : B
{
    private A myA;
    private static int countC = 0;
    public C(int x, int y): base(x, y)
      {
        this.myA = new A(x+y);
        countC++;
    }
    public static new int GetCount(){return countC;}
    public override string ToString()
      {
        return "C:"+base. ToString()+" ["+this.myA+"]";
    }
}// end of class C