diff --git a/SmallInjectorDemo/UsefulClass.cs b/SmallInjectorDemo/UsefulClass.cs
deleted file mode 100644
index 6eadd4e..0000000
--- a/SmallInjectorDemo/UsefulClass.cs
+++ /dev/null
@@ -1,41 +0,0 @@
-using System;
-
-namespace SmallInjectorDemo
-{
-    /// <summary>
-    /// A very useful class.
-    /// </summary>
-    public class UsefulClass
-    {
-        private readonly IServiceOne _service1;
-        private readonly IServiceTwo _service2;
-        private readonly int _rand;
-
-        /// <summary>
-        /// Creates a new instance of <see cref="UsefulClass"/>.
-        /// </summary>
-        /// <param name="service1">injected service one.</param>
-        /// <param name="service2">injected service two.</param>
-        public UsefulClass(IServiceOne service1, IServiceTwo service2)
-        {
-            _service1 = service1;
-            _service2 = service2;
-            _rand = Helper.NewRandomInteger(10, 99);
-            Console.WriteLine(nameof(UsefulClass) + ".ctor\tId: " + _rand);
-        }
-
-        /// <summary>
-        /// Test the injected services.
-        /// </summary>
-        public void TestTheServices()
-        {
-            Console.WriteLine(ToString());
-            Console.WriteLine(_service1.ToString());
-            Console.WriteLine(_service2.ToString());
-        }
-
-        /// <inheritdoc />
-        public override string ToString() => nameof(UsefulClass) + ".ToString()\tId: " + _rand;
-
-    }
-}
\ No newline at end of file