Add code examples, and documentation

patterns/state/WithStatePattern/Program.cs

@@ -0,0 +1,35 @@
+namespace WithStatePattern;
+
+public class Program
+{
+   private static void Main(string[] args)
+   {
+      var car = new Car();
+
+      string input;
+      bool keepRunning = true;
+
+      Console.WriteLine("Welcome to the Driving Simulater");
+      Console.WriteLine();
+      Console.WriteLine("Usage:");
+      Console.WriteLine("    turn-clockwise  -Turns the car's key clockwise");
+      Console.WriteLine(
+         "    turn-counter    -Turns the car's key counter clockwise"
+      );
+      Console.WriteLine("    gas             -Presses the gas pedal");
+      Console.WriteLine("    brake           -Presses the brake pedal");
+      Console.WriteLine("    exit            -Exits the simulator");
+      Console.WriteLine();
+
+      do
+      {
+         Console.Write("> ");
+         input = Console.ReadLine();
+         Console.WriteLine();
+         keepRunning = car.HandleInput(input);
+      } while (keepRunning);
+      Console.WriteLine();
+      Console.WriteLine("goodbye");
+      Console.WriteLine();
+   }
+}