C#EventDriven_Snake_2b

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Snake2b
{
    class Program
    {
        public enum Direction { Left, Right, Up, Down}

        static void Main(string[] args)
        {
            ConsoleKeyInfo cki;
            int positionX = 0;
            int positionY = 0;
            Direction direction = Direction.Right;
            char symbol = '*';
            Console.Title = "Arrow keys to steer. Esc to exit.";
            do
            {
                // 1. loop. Endless loop of the life
                while (!Console.KeyAvailable)
                {
                    switch (direction) {
                        case Direction.Right:
                            if (positionX < Console.WindowWidth - 1) positionX++;
                            symbol = '>';
                            break;
                        case Direction.Left:
                            if (positionX > 0) positionX--;
                            symbol = '<';
                            break;
                        case Direction.Up:
                            if (positionY > 0) positionY--;
                            symbol = '^';
                            break;
                        case Direction.Down:
                            if (positionY < Console.WindowHeight) positionY++;
                            symbol = 'v';
                            break;
                    }

                    Console.Clear();
                    Console.SetCursorPosition(positionX, positionY);
                    Console.ForegroundColor = ConsoleColor.Gray;
                    // Console.BackgroundColor = ConsoleColor.Yellow;
                    Console.Write(symbol); // "*"
                    // Console.WriteLine("The ifinite loop");
                    System.Threading.Thread.Sleep(150);
                }
                // 2. event happend. Meteorit is passing by.
                cki = Console.ReadKey(true);
                switch (cki.Key) {
                    case ConsoleKey.RightArrow :
                        direction = Direction.Right;
                        // if (positionX < Console.WindowWidth - 1) positionX++;
                        break;
                    case ConsoleKey.LeftArrow:
                        direction = Direction.Left;
                        // if (positionX > 0) positionX--;
                        break;
                    case ConsoleKey.UpArrow:
                        direction = Direction.Up;
                        // if (positionY > 0) positionY--;
                        break;
                    case ConsoleKey.DownArrow:
                        direction = Direction.Down;
                        // if (positionY < Console.WindowHeight) positionY++;
                        break;
                }
            } while (cki.Key != ConsoleKey.Escape);
        }
    }
}