C#

class Program
    {
        static void Main(string[] args)
        { 
            ContinuousDimension score = new ContinuousDimension("score", "score of word", "unit", 0, 10);    

            //Definition of basic fuzzy sets with which we will work
            //  input sets:

 ContinuousSet low = new RightQuadraticSet(score, "Low Score", 0, 3, 4);
            ContinuousSet high = new LeftQuadraticSet(score, "High Score", 6, 7, 10);
            ContinuousSet mod = new BellSet(score, "Moderate Score", 5, 1, 2);

....
}

public class CursistDepository : ObservableCollection<CursistViewModel>, IPersonDepository<CursistViewModel>
    {
        private static volatile CursistDepository instance;
        private static readonly object padlock = new object();
    
    public static CursistDepository Instance
        {
            get
            {
                if (instance == null)
                {
                    lock(padlock)
                    {
                        if(instance==null)
                        {
                            instance = new CursistDepository();
                            IEnumerable<ICursist> persons = Cursist.Select();
                            foreach (ICursist person in persons)
                            {
                                CursistViewModel model = new CursistViewModel(person);
                                instance.Add(model);
                            }
                        }
                    }
                }
                return instance;
            }
        }}