diff --git a/AutoFacSamles.sln b/AutoFacSamles.sln
index 3c1de9c..7e30169 100644
--- a/AutoFacSamles.sln
+++ b/AutoFacSamles.sln
@@ -13,6 +13,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AutoFacSamples2", "AutoFacS
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AutofacSamples3", "AutofacSamples3\AutofacSamples3.csproj", "{4EE75D74-3696-41D7-A5D0-A128956FBCBB}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AutofacSamples4", "AutofacSample3\AutofacSamples4.csproj", "{9F3E52C4-985F-47FD-9949-B5539200069F}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -39,6 +41,10 @@ Global
 		{4EE75D74-3696-41D7-A5D0-A128956FBCBB}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4EE75D74-3696-41D7-A5D0-A128956FBCBB}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4EE75D74-3696-41D7-A5D0-A128956FBCBB}.Release|Any CPU.Build.0 = Release|Any CPU
+		{9F3E52C4-985F-47FD-9949-B5539200069F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9F3E52C4-985F-47FD-9949-B5539200069F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9F3E52C4-985F-47FD-9949-B5539200069F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9F3E52C4-985F-47FD-9949-B5539200069F}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/AutofacSample3/AutofacSamples4.csproj b/AutofacSample3/AutofacSamples4.csproj
new file mode 100644
index 0000000..c73e0d1
--- /dev/null
+++ b/AutofacSample3/AutofacSamples4.csproj
@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+</Project>
diff --git a/AutofacSample3/Program.cs b/AutofacSample3/Program.cs
new file mode 100644
index 0000000..4fe8fa2
--- /dev/null
+++ b/AutofacSample3/Program.cs
@@ -0,0 +1,53 @@
+using System;
+
+namespace AutofacSamples4
+{
+
+    public interface ILog
+    {
+        void Write(string message);
+    }
+
+    public class ConsoleLog : ILog
+    {
+        public ConsoleLog()
+        {
+            Console.WriteLine($"Console log created at {DateTime.Now.Ticks}");
+        }
+        public void Write(string message)
+        {
+            Console.WriteLine(message);
+        }
+
+        public void Dispose()
+        {
+            Console.WriteLine($"Console logger no longer required");
+        }
+
+    }
+
+    public class SMSLog : ILog
+    {
+        private readonly string phoneNumber;
+
+        public SMSLog(string phoneNumber)
+        {
+            this.phoneNumber = phoneNumber;
+        }
+        public void Write(string message)
+        {
+            Console.WriteLine($"SMS to {phoneNumber} : {message}");
+        }
+        public void Dispose()
+        {
+        }
+    }
+
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello World!");
+        }
+    }
+}