diff --git a/Day 3 Class Examples/example13/Program.cs b/Day 3 Class Examples/example13/Program.cs
new file mode 100644
index 0000000..c866fa9
--- /dev/null
+++ b/Day 3 Class Examples/example13/Program.cs	
@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace example13
+{
+    abstract class Position
+    {
+        public abstract string Title { get; }
+    }
+
+    class Manager : Position
+    {
+        public override string Title
+        {
+            get { return "Manager"; }
+        }
+    }
+
+    class Clerk : Position
+    {
+        public override string Title
+        {
+            get { return "Clerk"; }
+        }
+    }
+
+    class Programmer : Position
+    {
+        public override string Title
+        {
+            get { return "Programmer"; }
+        }
+    }
+
+    static class Factory
+    {
+        public static Position Get(int id)
+        {
+            switch (id)
+            {
+                case 0:
+                    return new Manager();
+                case 1:
+                    return new Clerk();
+                default:
+                    return new Programmer();
+            }
+        }
+    }
+
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Position id = {0}, position = {1}", 0, Factory.Get(0));
+        }
+    }
+}