static void Main(string[] args)
    {
        Combatant swastik = new Combatant();

        swastik.CombatantInitialize("Swastik", "Bhattacharyya", 0);
        //add item to list
        combatList.Add(swastik);
        Combatant ankit = new Combatant();

        ankit.CombatantInitialize("Ankit", "Gupta", 1);
        //add item to list
        combatList.Add(ankit);
        Random rndIndex = new Random();
        var    idxGet   = rndIndex.Next(0, combatList.Count);

        //Output firstname to console
        Console.WriteLine(combatList[idxGet].firstName);
    }