public class IntVector
{
	public IntVector(int length) {}
	public int Length {
		get{}
	}					// read-only property
	public int this[int index] {
		get{}
	}		// read-write indexer
	public static IntVector operator ++(IntVector iv) {
	}
	public static IntVector operator >(IntVector iv) {
	}
	public static implicit operator overk[] (IntVector iv) {
	}


}
class A
{
	public A(int x, int y) {}
}
class B: A
{
	public B(int x, int y): base(x + y, x - y) {}
}

class A
{
	~A() {
		Console.WriteLine("A's destructor");
	}
}
class B: A
{
	extern ~B() {
		Console.WriteLine("B's destructor");
	}
}