Test console

TestConsole.cs

using System;
using System.Threading;
using System.Threading.Tasks;

namespace TestCsharpConsole
{
    public class Program
    {
        public static async Task Main(string[] args)
        {
            char key = ' ';
            int left = 1;
            int top = 1;
            const int width = 20;
            const int height = 20;
            var semaphore = new SemaphoreSlim(1);

            var map = new int[][]
            {
                new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
                new int[] { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
            };

            _ = Task.Run(() =>
            {
                while (true)
                {
                    key = Console.ReadKey(true).KeyChar;
                    semaphore.Release();
                }
            });

            Console.CursorVisible = false;
            while (true)
            {
                await semaphore.WaitAsync();
                DrawMap(0, 0, width, height, map);
                //if (Console.KeyAvailable)
                {
                    DrawChar(left, top, ' ', ConsoleColor.White);
                    switch (key)
                    {
                        case 'w':
                            top = Math.Max(1, top - 1);
                            break;
                        case 's':
                            top = Math.Min(height - 2, top + 1);
                            break;
                        case 'a':
                            left = Math.Max(1, left - 1);
                            break;
                        case 'd':
                            left = Math.Min(width - 2, left + 1);
                            break;
                    }
                    DrawChar(left, top, 'X', ConsoleColor.Red);
                }
            }
        }

        private static void DrawMap(int left, int top, int widht, int height, int [][]map)
        {
            for (var row = 0; row < height; ++row)
            {
                for(var col = 0;col < widht; ++col)
                {
                    var c = map[row][col];
                    switch (c)
                    {
                        case 0:
                            break;
                        case 1:
                            DrawChar(left + col, top + row, 'O', ConsoleColor.White);
                            break;
                    }
                }
            }
        }

        private static void DrawChar(int left, int top, char c, ConsoleColor color)
        {
            Console.ForegroundColor = color;
            Console.SetCursorPosition(left, top);
            Console.Write(c);
        }
    }
}