diff --git a/DependencyInjection.cs b/DependencyInjection.cs
index 4003b42..3fdd68a 100644
--- a/DependencyInjection.cs
+++ b/DependencyInjection.cs
@@ -1,3 +1,5 @@
+using System.Diagnostics;
+using System.Reflection.Metadata;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace DependencyInjections
@@ -33,12 +35,32 @@ namespace DependencyInjections
 
             serviceCollection.AddTransient<NotificationService>();
 
+            bool UseSQL = false;
+
+            if (UseSQL)
+            {
+                serviceCollection.AddTransient<IProductRepository, SqlProductRepository>();
+            }
+            else
+            {
+                serviceCollection.AddSingleton<IProductRepository, InMemoryProductReposity>();
+            }
+
+            serviceCollection.AddTransient<ProductService>();
+
+            serviceCollection.AddTransient<IGameEngine, GuessNumberGame>();
+            serviceCollection.AddTransient<IGameEngine, RockPaperScissorsGame>();
+
+            serviceCollection.AddTransient<GameManager>();
+
             var sp = serviceCollection.BuildServiceProvider();
 
             sp.GetRequiredService<UserService>().Log();
             sp.GetRequiredService<CheckoutService>().process();
             sp.GetRequiredService<NotificationService>().SendNotification("Hello, There");
-
+            sp.GetRequiredService<ProductService>().SeedProducts();
+            sp.GetRequiredService<ProductService>().DisplayAllProducts();
+            sp.GetRequiredService<GameManager>().Start();
         }
     }
 
@@ -162,4 +184,179 @@ namespace DependencyInjections
             }
         }
     }
+
+    public interface IProductRepository
+    {
+        List<string> GetAllProducts();
+        void AddProduct(string name);
+    }
+
+    public class InMemoryProductReposity : IProductRepository
+    {
+        List<string> products = new List<string>();
+
+        public void AddProduct(string name)
+        {
+            products.Add(name);
+        }
+
+        public List<string> GetAllProducts()
+        {
+            return products;
+        }
+    }
+
+    public class SqlProductRepository : IProductRepository
+    {
+        public void AddProduct(string name)
+        {
+            Console.WriteLine($"Wrote {name} to SQL Database");
+        }
+
+        public List<string> GetAllProducts()
+        {
+            Console.WriteLine("Got all products from SQL Database");
+            return new List<string>();
+        }
+    }
+
+    public class ProductService
+    {
+        private readonly IProductRepository productRepository;
+
+        public ProductService(IProductRepository productRepository)
+        {
+            this.productRepository = productRepository;
+        }
+
+        public void SeedProducts()
+        {
+            productRepository.AddProduct("Skovl");
+            productRepository.AddProduct("Spade");
+            productRepository.AddProduct("Spand");
+            productRepository.AddProduct("Teslacoil");
+        }
+
+        public void DisplayAllProducts()
+        {
+            foreach (var prod in productRepository.GetAllProducts())
+            {
+                Console.WriteLine($"Got: {prod}");
+            }
+        }
+    }
+
+    public interface IGameEngine
+    {
+        void Play();
+    }
+
+    public class GuessNumberGame : IGameEngine
+    {
+        public void Play()
+        {
+            int rightNumber = new Random().Next(1, 11);
+
+            Console.WriteLine("Guess number between 1 and 10");
+
+            var readline = Console.ReadLine();
+
+            if (int.TryParse(readline, out var number))
+            {
+                if (number.Equals(rightNumber))
+                {
+                    Console.WriteLine("You won.");
+                }
+                else
+                {
+                    Console.WriteLine("WRONG");
+                }
+            }
+            else
+            {
+                Console.WriteLine("Is that even a number?");
+            }
+        }
+    }
+
+    public class RockPaperScissorsGame : IGameEngine
+    {
+        public void Play()
+        {
+            var posibilities = new List<string>()
+            {
+                "scissor",
+                "paper",
+                "rock",
+            };
+
+            Console.WriteLine("Choose between");
+
+            for (int i = 0; i < posibilities.Count; i++)
+            {
+                Console.WriteLine($"{i}: {posibilities[i]}");
+            }
+
+            var readline = Console.ReadLine();
+
+            if (int.TryParse(readline, out var number))
+            {
+                if (number > posibilities.Count)
+                {
+                    Console.WriteLine("Must choose inside the range");
+                }
+
+                var computerPlay = new Random().Next(0, 3);
+
+                Console.WriteLine($"Computer choose: {posibilities[computerPlay]}");
+
+                if (computerPlay > number || (computerPlay == 0 && number == 2))
+                {
+                    Console.WriteLine("Computer won...");
+                }
+                else
+                {
+                    Console.WriteLine("You won");
+                }
+            }
+            else
+            {
+                Console.WriteLine("Is that even a number?");
+            }
+        }
+    }
+
+    public class GameManager
+    {
+        private readonly IEnumerable<IGameEngine> gameEngines;
+
+        public GameManager(IEnumerable<IGameEngine> gameEngines)
+        {
+            this.gameEngines = gameEngines;
+        }
+
+        public void Start()
+        {
+            Console.WriteLine("Choose game");
+
+            for (int i = 0; i < gameEngines.Count(); i++)
+            {
+                Console.WriteLine(i + ": " + gameEngines.ToList()[i].GetType().Name);
+            }
+
+            var readline = Console.ReadLine();
+
+            if (int.TryParse(readline, out var number))
+            {
+                if (number > gameEngines.Count())
+                {
+                    Console.WriteLine("Must be in range");
+                }
+                else
+                {
+                    gameEngines.ToList()[number].Play();
+                }
+            }
+        }
+    }
 }
\ No newline at end of file