Multiple solutions for bullet 6.

Bullet6/Bullet6.csproj

@@ -7,4 +7,8 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.1" />
+  </ItemGroup>
+
 </Project>

Bullet6/IFlow.cs

@@ -0,0 +1,4 @@
+public interface IFlow
+{
+    Task Start();
+}

Bullet6/Program.cs

@@ -1,15 +1,25 @@
-using Bullet6.Handlers;
-using Bullet6.Interfaces;
-using Bullet6.Models;
+using Bullet6.Solution1;
+using Bullet6.Solution2;
+using Microsoft.Extensions.DependencyInjection;
+using System;
 
 namespace Bullet6
 {
     public class Program
     {
-        static void Main(string[] args)
+        static async Task Main(string[] args)
         {
-            IEntity[] entites = [new Employee() { Name = "Ilias" }, new Manager() { Name = "Maria" }];
-            foreach (var entity in entites) EntityHandler.PrintName(entity);
+            ServiceCollection services = new ServiceCollection();
+            services.AddSingleton<ISolution1Service, Solution1Service>();
+            services.AddSingleton<ISolution2Service, Solution2Service>();
+            var serviceProvider = services.BuildServiceProvider();
+
+            List<IFlow> flows = new List<IFlow>()
+            {
+                serviceProvider.GetRequiredService<ISolution1Service>(),
+                serviceProvider.GetRequiredService<ISolution2Service>()
+            };
+            foreach (var flow in flows) await flow.Start();
         }
     }
 }

Bullet6/Solution1/ISolution1Service.cs

@@ -0,0 +1,7 @@
+namespace Bullet6.Solution1
+{
+    public interface ISolution1Service : IFlow
+    {
+
+    }
+}

Bullet6/Solution1/Models/Employee.cs

@@ -1,6 +1,4 @@
-using Bullet6.Interfaces;
-
-namespace Bullet6.Models
+namespace Bullet6.Solution1.Models
 {
     public class Employee : IEntity
     {

Bullet6/Solution1/Models/EntityHandler.cs

@@ -1,6 +1,4 @@
-using Bullet6.Interfaces;
-
-namespace Bullet6.Handlers
+namespace Bullet6.Solution1.Models
 {
     public static class EntityHandler
     {

Bullet6/Solution1/Models/IEntity.cs

@@ -1,4 +1,4 @@
-namespace Bullet6.Interfaces
+namespace Bullet6.Solution1.Models
 {
     public interface IEntity
     {

Bullet6/Solution1/Models/Manager.cs

@@ -1,6 +1,4 @@
-using Bullet6.Interfaces;
-
-namespace Bullet6.Models
+namespace Bullet6.Solution1.Models
 {
     public class Manager : IEntity
     {

Bullet6/Solution1/Solution1Service.cs

@@ -0,0 +1,16 @@
+using Bullet6.Solution1.Models;
+
+namespace Bullet6.Solution1
+{
+    public class Solution1Service : ISolution1Service
+    {
+        public Task Start()
+        {
+            Console.WriteLine($"{nameof(Solution1Service)} starting");
+            IEntity[] entites = [new Employee() { Name = "Ilias" }, new Manager() { Name = "Maria" }];
+            foreach (var entity in entites) EntityHandler.PrintName(entity);
+            Console.WriteLine($"{nameof(Solution1Service)} ended");
+            return Task.CompletedTask;
+        }
+    }
+}

Bullet6/Solution2/ISolution2Service.cs

@@ -0,0 +1,7 @@
+namespace Bullet6.Solution2
+{
+    public interface ISolution2Service : IFlow
+    {
+
+    }
+}

Bullet6/Solution2/Models/Employee.cs

@@ -0,0 +1,10 @@
+namespace Bullet6.Solution2.Models
+{
+    public class Employee : Entity
+    {
+        protected override void PrintInternal()
+        {
+            // print the rest possible fields
+        }
+    }
+}

Bullet6/Solution2/Models/Entity.cs

@@ -0,0 +1,14 @@
+namespace Bullet6.Solution2.Models
+{
+    public abstract class Entity
+    {
+        public string Name { get; set; }
+        protected abstract void PrintInternal();
+
+        public void PrintName()
+        {
+            Console.WriteLine(this.Name);
+            this.PrintInternal();
+        }
+    }
+}

Bullet6/Solution2/Models/Manager.cs

@@ -0,0 +1,10 @@
+namespace Bullet6.Solution2.Models
+{
+    public class Manager : Entity
+    {
+        protected override void PrintInternal()
+        {
+            // print the rest possible fields
+        }
+    }
+}

Bullet6/Solution2/Solution2Service.cs

@@ -0,0 +1,16 @@
+using Bullet6.Solution2.Models;
+
+namespace Bullet6.Solution2
+{
+    public class Solution2Service : ISolution2Service
+    {
+        public Task Start()
+        {
+            Console.WriteLine($"{nameof(Solution2Service)} starting");
+            Entity[] entites = [new Employee() { Name = "Ilias" }, new Manager() { Name = "Maria" }];
+            foreach (var entity in entites) entity.PrintName();
+            Console.WriteLine($"{nameof(Solution2Service)} ended");
+            return Task.CompletedTask;
+        }
+    }
+}