StockInfoCoreApp/StockBL/PersonStockFacade.cs

using DataDomain;
using StockBL.Interface;
using StockDAL.Interface;
using System;
using System.Collections.Generic;
using System.Linq;

namespace StockBL
{
    public class PersonStockFacade : IPersonStockFacade
    {
        private readonly IStockPersonConnect _stockPersonConnect;
        private readonly IStockRepository _stockRepository;

        public PersonStockFacade(IStockPersonConnect stockPersonConnect, IStockRepository stockRepository)
        {
            _stockPersonConnect = stockPersonConnect;
            _stockRepository = stockRepository;
        }

        public IEnumerable<StockMember> GetUnconnectedShares()
        {
            var stockList = _stockRepository.GetAllStocks();
            var connectList = _stockPersonConnect.GetAllConnectedStocks();


            var stcList = (from st in stockList
                           where connectList.Any(co => st.Id == co.StockId) 
                           select st).ToList();

            var sList = stockList.Except(stcList).ToList();

            return sList;
        }

        public IEnumerable<StockMember> GetAllSharesConnectedTo(int personId)
        {
            var personConnections = _stockPersonConnect.GetAllConnectionsByPersId(personId);
            var stockList = _stockRepository.GetAllStocks();

            var stcList = (from st in stockList
                           where personConnections.Any(pc => st.Id == pc.StockId)
                           select st).ToList();
            return stcList;
        }
    }
}