Add project files.

StockBL/PersonStockFacade.cs

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+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;
+        }
+    }
+}

StockBL/StockBL.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\DataDomain\DataDomain.csproj" />
+    <ProjectReference Include="..\DatamodelLibrary\DatamodelLibrary.csproj" />
+    <ProjectReference Include="..\StockBL.Interface\StockBL.Interface.csproj" />
+    <ProjectReference Include="..\StockDal.Interface\StockDAL.Interface.csproj" />
+  </ItemGroup>
+
+</Project>