Add code examples, and documentation

patterns/state/WithStatePattern/States/Driving.cs

@@ -0,0 +1,27 @@
+namespace WithStatePattern.States;
+
+public class Driving : State
+{
+   public Driving(Car car)
+      : base(car) { }
+
+   public override void TurnKeyClockwise()
+   {
+      Console.WriteLine("You hear a grinding noise...");
+      Console.WriteLine();
+   }
+
+   public override void TurnKeyCounterClockwise()
+   {
+      Console.WriteLine("The engine turns off, and the car stops suddenly");
+      Console.WriteLine();
+      _car.ChangeState(new Off(_car));
+   }
+
+   public override void PressBrake()
+   {
+      Console.WriteLine("The car slows to a stop");
+      Console.WriteLine();
+      _car.ChangeState(new Stopped(_car));
+   }
+}