Add project files.

StockDal.Interface/IStockMarketRepository.cs

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+using DataDomain;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StockDal.Interface
+{
+    public interface IStockMarketRepository
+    {
+        Dictionary<string, DiTraderStockRow> StockMarketList { get; set; }
+        bool ViewBrowser { get; set; }
+
+        void Clean();
+        void LoadStockMarketList();
+        void LoadStockMarketList(bool viewBrowser);
+        void RefreshMarketList();
+    }
+}

StockDal.Interface/IStockRepository.cs

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+using DataDomain;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace StockDAL.Interface
+{
+    public interface IStockRepository
+    {
+        IEnumerable<StockMember> GetAllRemainingStocks();
+        IEnumerable<StockMember> GetAllStocks();
+        void InsertMany(List<StockMember> stockMembers);
+        void SaveStockMember(StockMember stockMember);
+        void UpdateActualPrice(int id, decimal price);
+    }
+}

StockDal.Interface/StockDAL.Interface.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="HtmlAgilityPack" Version="1.11.29" />
+  </ItemGroup>  
+  
+  <ItemGroup>
+    <ProjectReference Include="..\DataDomain\DataDomain.csproj" />
+  </ItemGroup>
+
+</Project>