using CarRepairShopListImplement.Models; namespace CarRepairShopListImplement { public class DataListSingleton { private static DataListSingleton? _instance; public List Components { get; set; } public List Orders { get; set; } public List Repairs { get; set; } public List Shops { get; set; } public List Clients { get; set; } public List Implementers { get; set; } private DataListSingleton() { Components = new List(); Orders = new List(); Repairs = new List(); Shops = new List(); Clients = new List(); Implementers = new List(); } public static DataListSingleton GetInstance() { if (_instance == null) { _instance = new DataListSingleton(); } return _instance; } } }