Add code examples, and documentation

patterns/state/WithoutStatePattern/Car.cs

@@ -0,0 +1,75 @@
+namespace WithoutStatePattern;
+
+public class Car
+{
+   private State _state = State.Off;
+
+   public bool HandleInput(string input)
+   {
+      switch (input)
+      {
+         case "turn-clockwise":
+            switch (_state)
+            {
+               case State.Off:
+                  Console.WriteLine("The engine has started");
+                  Console.WriteLine();
+                  _state = State.Stopped;
+                  break;
+               case State.Stopped:
+               case State.Driving:
+                  Console.WriteLine("You hear a grinding noise...");
+                  Console.WriteLine();
+                  break;
+            }
+            break;
+         case "turn-counter":
+            switch (_state)
+            {
+               case State.Stopped:
+                  Console.WriteLine("The engine has stopped");
+                  Console.WriteLine();
+                  _state = State.Off;
+                  break;
+               case State.Driving:
+                  Console.WriteLine(
+                     "The engine turns off, and the car stops suddenly"
+                  );
+                  Console.WriteLine();
+                  _state = State.Off;
+                  break;
+            }
+            break;
+         case "gas":
+            switch (_state)
+            {
+               case State.Stopped:
+                  Console.WriteLine("The car begins to drive");
+                  Console.WriteLine();
+                  _state = State.Driving;
+                  break;
+            }
+            break;
+         case "brake":
+            switch (_state)
+            {
+               case State.Driving:
+                  Console.WriteLine("The car slows to a stop");
+                  Console.WriteLine();
+                  _state = State.Stopped;
+                  break;
+            }
+            break;
+         case "exit":
+            return false;
+      }
+      return true;
+   }
+
+   private enum State
+   {
+      Off,
+      Stopped,
+      Driving,
+   }
+}

patterns/state/WithoutStatePattern/Program.cs

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+namespace WithoutStatePattern;
+
+internal 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();
+   }
+}

patterns/state/WithoutStatePattern/WithoutStatePattern.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+   <PropertyGroup>
+      <OutputType>Exe</OutputType>
+      <TargetFramework>net10.0</TargetFramework>
+      <ImplicitUsings>enable</ImplicitUsings>
+      <Nullable>enable</Nullable>
+   </PropertyGroup>
+</Project>