Like Lethal said, you had some bugs in your last constructor. Try the following and let us know if it's working (it should work). Also note, because of what you're doing, i will equal j...

PHP Code:
public MyDerivedClass(int j) : base(j)
{
   Console.WriteLine("MyDerivedClass(int j) : base(i) -> i={0} j={1}",i,j);
}