ISEbd-21_Koscheev.M.S.SoftwareInstallation/SoftwareInstallation/SoftwareInstallationListImplement/DataListSingleton.cs

using SoftwareInstallationListImplement.Models;

namespace SoftwareInstallationListImplement
{
    public class DataListSingleton
    {
        private static DataListSingleton? _instance;
        public List<Component> Components { get; set; }
        public List<Order> Orders { get; set; }
        public List<Package> Packages { get; set; }
        private DataListSingleton()
        {
            Components = new List<Component>();
            Orders = new List<Order>();
            Packages = new List<Package>();
        }
        public static DataListSingleton GetInstance()
        {
            if (_instance == null)
            {
                _instance = new DataListSingleton();
            }
            return _instance;
        }
    }
}