I have the following class:

class Axis
    {
        private int _num1;
        private int _num2;
        private int _num3;

        public int Num1 {
            get { return _num1; }
            set { _num1 = value; }
        }

        public int Num2 {
            get { return _num2; }
            set { _num2 = value; }
        }

        public int Num3 {
            get { return _num3; }
            set { _num3 = value; }
        }

        public Lotto() {

    }

        public Lotto(int[] ExcludedNumbers) {
        // Initialise variable to random numbers not in the above array
    }
}

What I would like, to be able to do is initialise this class setting
Num1, Num2, Num3 to random values (they must differ from each other).
However when I initialise it, passing an array of integer I would like
Num1, Num2, Num3 to be initialised to random values, but if the value
exists in the ExcludedNumbers array, a different random value should be
used, as before, these values should all differ from each other.

If someone could help that would be great, I'm not nessesarily looking
for a code soloution, but just some help on they way.

Kind Regards
Mick Walker