Add code examples, and documentation

patterns/state/WithStatePattern/Car.cs

@@ -0,0 +1,44 @@
+#region
+
+using WithStatePattern.States;
+
+#endregion
+
+namespace WithStatePattern;
+
+public class Car
+{
+   private State _state;
+
+   public Car()
+   {
+      ChangeState(new Off(this));
+   }
+
+   public bool HandleInput(string input)
+   {
+      switch (input)
+      {
+         case "turn-clockwise":
+            _state.TurnKeyClockwise();
+            break;
+         case "turn-counter":
+            _state.TurnKeyCounterClockwise();
+            break;
+         case "gas":
+            _state.PressGas();
+            break;
+         case "brake":
+            _state.PressBrake();
+            break;
+         case "exit":
+            return false;
+      }
+      return true;
+   }
+
+   public void ChangeState(State state)
+   {
+      _state = state;
+   }
+}