4.4

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

namespace Les3
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.CursorVisible = false;
            Console.Title = "4.4 Brave new world";

            char[,] map = GetMap(30, 10);

            int userX = 3, userY = 3;
            while (true)
            {
                DrawMap(ref map);

                Console.SetCursorPosition(userY, userX);
                Console.Write('@');
                ConsoleKeyInfo charKey = Console.ReadKey(true);

                switch (charKey.Key)
                {
                    case ConsoleKey.LeftArrow:
                        if (map[userX, userY - 1] != '#')
                            userY--;
                        break;
                    case ConsoleKey.RightArrow:
                        if (map[userX, userY + 1] != '#')
                            userY++;
                        break;
                    case ConsoleKey.UpArrow:
                        if (map[userX - 1, userY] != '#')
                            userX--;
                        break;
                    case ConsoleKey.DownArrow:
                        if (map[userX + 1, userY] != '#')
                            userX++;
                        break;
                }
            }
        }

        static char[,] GetMap(int y, int x)
        {
            char[,] map = new char[x, y];
            for (int h = 1; h < map.GetLength(0); h++)
            {
                for (int w = 0; w < map.GetLength(1); w++)
                {
                    map[h, w] = '.';
                }
            }

            for (int i = 0; i < map.GetLength(1); i++)
            {
                map[0, i] = '#';
                map[map.GetLength(0) - 1, i] = '#';
            }

            for (int i = 0; i < map.GetLength(0); i++)
            {
                map[i, 0] = '#';
                map[i, map.GetLength(1) - 1] = '#';
            }

            return map;
        }

        static void DrawMap(ref char[,] map)
        {
            Console.SetCursorPosition(0, 0);
            for (int i = 0; i < map.GetLength(0); i++)
            {
                for (int j = 0; j < map.GetLength(1); j++)
                {
                    Console.Write(map[i, j]);
                }
                Console.WriteLine();
            }
        }
    }
}