ISEbd-21_Agliullov.D.A._Confectionery/ConfectionaryListImplement/DataListSingleton.cs

using EkzamenListImplement;

namespace ConfectioneryListImplement
{
    public class DataListSingleton
    {
        private static DataListSingleton? _instance;
        public List<Student> Students { get; set; }
        public List<Group> Groups { get; set; }
        private DataListSingleton()
        {
            Students = new List<Student>();
            Groups = new ();
        }
        public static DataListSingleton GetInstance()
        {
            if (_instance == null)
            {
                _instance = new DataListSingleton();
            }
            return _instance;
        }
    }
}