From b469188f2842618a2ba093542d225a3aaeb2adb6 Mon Sep 17 00:00:00 2001
From: syneffort <syneffort@gmail.com>
Date: Thu, 11 May 2023 13:56:53 +0900
Subject: [PATCH] di injection

---
 MySolution/ConsoleApp/Program.cs              | 17 +++++-
 .../ConsoleApp/Samples/CalculateSample.cs     |  2 +-
 MySolution/ConsoleApp/Samples/DISample.cs     | 58 +++++++++++++++++++
 MySolution/ConsoleApp/Samples/EventSample.cs  |  2 +-
 .../Samples/MessagePrinterSample.cs           |  2 +-
 ...{StringLength.cs => StringLengthSample.cs} |  4 +-
 6 files changed, 77 insertions(+), 8 deletions(-)
 create mode 100644 MySolution/ConsoleApp/Samples/DISample.cs
 rename MySolution/ConsoleApp/Samples/{StringLength.cs => StringLengthSample.cs} (93%)

diff --git a/MySolution/ConsoleApp/Program.cs b/MySolution/ConsoleApp/Program.cs
index 1e4a126..53dc347 100644
--- a/MySolution/ConsoleApp/Program.cs
+++ b/MySolution/ConsoleApp/Program.cs
@@ -1,4 +1,8 @@
-using Samples;
+using Samples.Calculate;
+using Samples.DI;
+using Samples.Event;
+using Samples.MessagePrinter;
+using Samples.StringLength;
 
 namespace ConsoleApp;
 class Program
@@ -15,16 +19,23 @@ class Program
 
         #region Callback
         
-        // StringLength.Sample();
+        // StringLengthSample.Sample();
 
         #endregion
 
 
         #region Event
             
-        EventSample.Sample();
+        // EventSample.Sample();
 
         #endregion
 
+
+        #region Dependency Injection
+
+            DISample.Sample();
+            
+        #endregion
+
     }
 }
diff --git a/MySolution/ConsoleApp/Samples/CalculateSample.cs b/MySolution/ConsoleApp/Samples/CalculateSample.cs
index c9e69ca..86055bb 100644
--- a/MySolution/ConsoleApp/Samples/CalculateSample.cs
+++ b/MySolution/ConsoleApp/Samples/CalculateSample.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Samples
+namespace Samples.Calculate
 {
     class CalculateSample
     {
diff --git a/MySolution/ConsoleApp/Samples/DISample.cs b/MySolution/ConsoleApp/Samples/DISample.cs
new file mode 100644
index 0000000..d71278c
--- /dev/null
+++ b/MySolution/ConsoleApp/Samples/DISample.cs
@@ -0,0 +1,58 @@
+namespace Samples.DI
+{
+    class DISample
+    {
+        public static void Sample()
+        {
+            DIContainer container = new DIContainer();
+            container.Register<IService, Service>();
+            
+            Client client = new Client(container.Resolve<IService>());
+            client.Run();
+        }
+    }
+
+    public interface IService
+    {
+        void DoSomething();
+    }
+
+    public class Service : IService
+    {
+        public void DoSomething()
+        {
+            Console.WriteLine("Service is doing something...");
+        }
+    }
+
+    public class Client
+    {
+        private readonly IService _service;
+
+        public Client(IService service)
+        {
+            _service = service;
+        }
+
+        public void Run()
+        {
+            _service.DoSomething();
+        }
+    }
+
+    public class DIContainer
+    {
+        private readonly Dictionary<Type, Type> _typemappings = new Dictionary<Type, Type>();
+
+        public void Register<TInterface, TImplementation>()
+        {
+            _typemappings[typeof(TInterface)] = typeof(TImplementation);
+        }
+
+        public TInterface Resolve<TInterface>()
+        {
+            Type implementationType = _typemappings[typeof(TInterface)];
+            return (TInterface)Activator.CreateInstance(implementationType);
+        }
+    }
+}
\ No newline at end of file
diff --git a/MySolution/ConsoleApp/Samples/EventSample.cs b/MySolution/ConsoleApp/Samples/EventSample.cs
index 38df234..8539f7d 100644
--- a/MySolution/ConsoleApp/Samples/EventSample.cs
+++ b/MySolution/ConsoleApp/Samples/EventSample.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Samples
+namespace Samples.Event
 {
     public delegate void CustomEventHandler(object sender, EventArgs e);
 
diff --git a/MySolution/ConsoleApp/Samples/MessagePrinterSample.cs b/MySolution/ConsoleApp/Samples/MessagePrinterSample.cs
index 031934c..524ab5b 100644
--- a/MySolution/ConsoleApp/Samples/MessagePrinterSample.cs
+++ b/MySolution/ConsoleApp/Samples/MessagePrinterSample.cs
@@ -2,7 +2,7 @@ using System;
 using System.Diagnostics;
 using System.Threading.Tasks;
 
-namespace Samples
+namespace Samples.MessagePrinter
 {
     class MessagePrinterSample
     {
diff --git a/MySolution/ConsoleApp/Samples/StringLength.cs b/MySolution/ConsoleApp/Samples/StringLengthSample.cs
similarity index 93%
rename from MySolution/ConsoleApp/Samples/StringLength.cs
rename to MySolution/ConsoleApp/Samples/StringLengthSample.cs
index 03e1ea5..cb5cc3f 100644
--- a/MySolution/ConsoleApp/Samples/StringLength.cs
+++ b/MySolution/ConsoleApp/Samples/StringLengthSample.cs
@@ -1,8 +1,8 @@
 using System;
 
-namespace Samples
+namespace Samples.StringLength
 {
-    class StringLength
+    class StringLengthSample
     {
         public static void Sample()
         {