using System;

​

namespace EnumTest

{

    /* Symbol definitions */

    public abstract class TabSymbolBase { }

​

    public abstract class ContactDetailTabSymbol : TabSymbolBase

    {

        public class BasicInfoTabSymbol : ContactDetailTabSymbol { }

        public class TeamListTabSymbol : ContactDetailTabSymbol { }

    }

​

    public abstract class MainTabSymbol : TabSymbolBase

    {

        public class ChannelListTabSymbol : MainTabSymbol { }

        public class FavroitesTabSymbol : MainTabSymbol { }

        public class SearchTabSymbol : MainTabSymbol { }

    }

    /* Tabs interfaces */

    public interface ITabViewModel

    {

        string Title { get;}

    }

    public interface ISymbolTabViewModel<out TTabSymbol> : ITabViewModel where TTabSymbol : TabSymbolBase

    {

        TTabSymbol TabSymbol { get; }

    }

​

    public interface IMainTabViewModel<TMainTabSymbol> : ISymbolTabViewModel<TMainTabSymbol> where TMainTabSymbol : MainTabSymbol

    {

    }

​

    public interface IContactDetailTabViewModel<TContactDetailTabSymbol> : ISymbolTabViewModel<TContactDetailTabSymbol> where TContactDetailTabSymbol : ContactDetailTabSymbol

    {

    }

    /* Usage */

    public class ChannelListViewModel : IMainTabViewModel<MainTabSymbol.ChannelListTabSymbol>

    {

        public string Title => "Title";

    }

​

    public class FavoritesViewModel : IMainTabViewModel

    {

        public MainTabSymbols TabSymbol => MainTabSymbols.Favorites;

        public string Title => "Title";

    }

​

    public class SearchViewModel : IMainTabViewModel

    {

        public MainTabSymbols TabSymbol => MainTabSymbols.Search;

        public string Title => "Title";

​

    }

​

    public class BasicInfoViewModel : IContactDetailTabViewModel

    {

        public ContactDetailTabSymbols TabSymbol => ContactDetailTabSymbols.BasicInfo;

        public string Title => "Title";

    }

​

    public class TeamListViewModel : IContactDetailTabViewModel

    {

        public ContactDetailTabSymbols TabSymbol => ContactDetailTabSymbols.TeamList;

        public string Title => "Title";

    }

    public class Program

    {

        public static void Main(string[] args)

        {

            Console.WriteLine(new TeamListViewModel().TabSymbol.GetType().Name);

        }

    }

}