gistfile1.txt

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Series
{
    public class SubMenuBuilder
    {
        private ISubMenuHolder parentMenu;
        public SubMenuBuilder(ISubMenuHolder menu)
        {
            parentMenu = menu;
        }

        public SubMenuBuilder AddSubMenu(string name)
        {
            var menu = new SimpleSubMenu { Name = name };
            menu.ParentId = ((Menu)parentMenu).Id;
            parentMenu.AddSubMenu(menu);
            return this;
        }

        public NestedSubMenuBuilder AddSubModule(string name)
        {
            var menu = new NestedSubMenu { Name = name };
            menu.ParentId = ((Menu)parentMenu).Id;
            parentMenu.AddSubMenu(menu);
            return new NestedSubMenuBuilder(this, menu);
        }

        public class NestedSubMenuBuilder 
        {
            private SubMenuBuilder holder;
            private ISubMenuHolder parentMenu;
            public NestedSubMenuBuilder(SubMenuBuilder _holder, ISubMenuHolder _menu)
            {
                holder = _holder;
                parentMenu = _menu;
            }

            public NestedSubMenuBuilder AddSubMenu(string name)
            {
                var menu = new SimpleSubMenu { Name = name };
                menu.ParentId = ((Menu)parentMenu).Id;
                parentMenu.AddSubMenu(menu);
                return this;
            }

            public NestedSubMenuBuilder AddSubModule(string name)
            {
                var menu = new NestedSubMenu { Name = name };
                menu.ParentId = ((Menu)parentMenu).Id;
                parentMenu.AddSubMenu(menu);
                return new NestedSubMenuBuilder(new SubMenuBuilder(parentMenu), menu);
            }

            public SubMenuBuilder Build()
            {
                return holder;
            }
        }
    }
}



using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Series
{
    public class TopMenu : Menu , ISubMenuHolder
    {
        public TopMenu()
        {
            SubMenus = new List<SubMenu>();
        }
        public void AddSubMenu(SubMenu menu)
        {
            SubMenus.Add(menu);
        }

        public List<SubMenu> SubMenus
        {
            get;
            set;
        }
    }
}


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Series
{
    public abstract class SubMenu : Menu
    {
        public Guid ParentId
        {
            get;
            set;
        }
    }
}
  using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Series
{
    public class MenuDemo
    {
        public static void Main(string[] args)
        {
            var builder = new MenuBuilder();
            builder.AddMenu("Top1")
                   .AddSubMenu("Top1 -> Sub Menu 1")
                   .AddSubModule("Top1 -> SubModuleMenu 1")
                       .AddSubMenu("Top1 -> SubModule 1 -> Menu 1")
                       .AddSubMenu("Top1 -> SubModule 1 -> Menu 2")
                       .AddSubModule("Top1 -> SubModule 1 -> SubModuleMenu 1")
                           .AddSubMenu("Top1 -> SubModule 1 -> SubModule 1 -> Menu 1")
                           .AddSubMenu("Top1 -> SubModule 1 -> SubModule 1 -> Menu 2")
                           .AddSubMenu("Top1 -> SubModule 1 -> SubModule 1 -> Menu 3")
                           .Build()
                       .AddSubMenu("Top1 -> SubModule 1 -> Menu 3")
                       .AddSubMenu("Top1 -> SubModule 1 -> Menu 4")
                       .AddSubMenu("Top1 -> SubModule 1 -> Menu 5");
                        
        }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Series
{
    public class MenuBuilder
    {
        List<Menu> menus = new List<Menu>();
        public SubMenuBuilder AddMenu(string name)
        {
            var mainMenu = new TopMenu { Name = name };
            menus.Add(mainMenu);
           return new SubMenuBuilder(mainMenu);
        }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Series
{
    public interface ISubMenuHolder
    {
        List<SubMenu> SubMenus
        {
            get;
            set;
        }

        void AddSubMenu(SubMenu menu);
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Series
{
    public class SimpleSubMenu : SubMenu
    {
    }

    public class NestedSubMenu : SubMenu , ISubMenuHolder
    {
        public NestedSubMenu()
        {
            SubMenus = new List<SubMenu>();
        }
        public List<SubMenu> SubMenus
        {
            get;
            set;
        }

        public void AddSubMenu(SubMenu menu)
        {
            SubMenus.Add(menu);
        }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Series
{
    public abstract class SubMenu : Menu
    {
        public Guid ParentId
        {
            get;
            set;
        }
    }
}