using System;

using System.Collections.Generic;

using Mapster;

using MapsterMapper;

using System.Linq;

​

public class Stock{

  public int StockId { get; set; }

  public int? ParentStockId { get; set; }

  public int Level { get; set; }

  public string Name { get; set; }

}

​

public class StockViewModel {

  public int Level { get; set; }

  public string Name { get; set; }

  public IEnumerable<StockViewModel> SubStock { get; set; }

}

​

public class MainClass {

    public static void Main (string[] args) {

        var mapper = new Mapper(); 

        var stocks = new List<Stock> {

            new Stock{ StockId = 1, Level = 10, Name = "Root1" },

            new Stock{ StockId = 2, Level = 10, Name = "Root2" },

            new Stock{ StockId = 3, ParentStockId = 1, Level = 20, Name = "Area1" },

            new Stock{ StockId = 4, ParentStockId = 2, Level = 20, Name = "Area2" },

            new Stock{ StockId = 5, ParentStockId = 3, Level = 30, Name = "Box11" },

            new Stock{ StockId = 6, ParentStockId = 3, Level = 30, Name = "Box12" },

            new Stock{ StockId = 7, ParentStockId = 4, Level = 30, Name = "Box21" }

        };

        TypeAdapterConfig<Stock, StockViewModel>

            .NewConfig()

            .Map(dst => dst.SubStock, src => stocks.Where(x => x.ParentStockId == src.StockId).ToList());

        var viewStocks = mapper.Map<IEnumerable<Stock>, IEnumerable<StockViewModel>>(stocks.Where(x => x.ParentStockId == null));

        foreach (var stock in viewStocks){

            Console.WriteLine(stock.Level.ToString() + " " + stock.Name);

            if (stock.SubStock != null) 

                foreach (var stock1 in stock.SubStock){

                    Console.WriteLine("  " + stock1.Level.ToString() + " " + stock1.Name);

                    if (stock1.SubStock != null) 

                        foreach (var stock2 in stock1.SubStock){

                            Console.WriteLine("    " + stock2.Level.ToString() + " " + stock2.Name);

                        }

                }

        }

  }

}