Composite IComparer implementation.
Inheritance: IComparer
		public void TestCompositeComparer()
		{
			CompositeComparer comparer = new CompositeComparer(
				new ObjectPropertyComparer(typeof(Product), "Name"),
				new ObjectPropertyComparer(typeof(Product), "Price")
				);		
			
			Array.Sort(_products, comparer);			
			AssertProducts(_product2, _product1, _product4, _product3);
		}