simpleConsoleMovement

using System;

public class ConsoleMove
{
    public static void Main()
    {
        Console.CursorVisible = false;
        Console.Write("@");

        var playingGame = true;
        var playerX = 0;
        var playerY = 0;

        while (playingGame)
        {
            if (Console.KeyAvailable)
            {
                Console.SetCursorPosition(playerX, playerY);
                Console.Write(" ");

                ConsoleKeyInfo input = Console.ReadKey(true);

                switch (input.Key)
                {
                    case ConsoleKey.UpArrow:
                        if (playerY > 0)
                        {
                            playerY--;
                        }

                        break;
                    case ConsoleKey.DownArrow:
                        playerY++;
                        break;
                    case ConsoleKey.LeftArrow:
                        if (playerX > 0)
                        {
                            playerX--;
                        }

                        break;
                    case ConsoleKey.RightArrow:
                        playerX++;
                        break;
                    case ConsoleKey.Escape:
                        playingGame = false;
                        break;
                }

                Console.SetCursorPosition(playerX, playerY);
                Console.Write("@");
            }
        }
    }
}