Brave new world2

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

namespace Tasks
{
    class Program
    {
        static void Main(string[] args)
        {
            char[,] map = { { '*', '*', '*', '*', '*','*', '*', '*', '*', '*', '*' },
                            { '*', ' ', ' ', ' ', '*',' ', ' ', ' ', ' ', ' ', '*' },
                            { '*', ' ', ' ', ' ', '*',' ', ' ', ' ', ' ', ' ', '*' },
                            { '*', ' ', ' ', ' ', '*',' ', ' ', ' ', ' ', ' ', '*' },
                            { '*', ' ', ' ', ' ', ' ',' ', ' ', ' ', ' ', ' ', '*' },
                            { '*', ' ', ' ', ' ', ' ',' ', ' ', ' ', ' ', ' ', '*' },
                            { '*', ' ', ' ', ' ', ' ',' ', ' ', ' ', ' ', ' ', '*' },
                            { '*', ' ', ' ', ' ', ' ',' ', ' ', ' ', ' ', ' ', '*' },
                            { '*', ' ', '*', ' ', ' ',' ', ' ', ' ', ' ', ' ', '*' },
                            { '*', ' ', '*', ' ', ' ',' ', ' ', ' ', '*', ' ', '*' },
                            { '*', ' ', '*', ' ', ' ',' ', ' ', ' ', '*', ' ', '*' },
                            { '*', '*', '*', '*', '*','*', '*', '*', '*', '*', '*' }};

            Console.CursorVisible = false;
            int userX = 6, userY = 6;
            while (true)
            {
                DrawMap(ref map);
                Console.SetCursorPosition(userY, userX);
                Console.Write("$");
                ConsoleKeyInfo playerKey = Console.ReadKey();
                if (CheckWall(playerKey, ref map, ref userX, ref userY))
                {
                    MovePlayer(playerKey,ref userX, ref userY);
                }

                Console.Clear();
            }
        }

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

        static void MovePlayer(ConsoleKeyInfo playerInput, ref int xposition, ref int yPosition)
        {
            switch (playerInput.Key)
            {
                case ConsoleKey.UpArrow:
                        xposition--;
                    break;
                case ConsoleKey.DownArrow:
                        xposition++;
                    break;
                case ConsoleKey.LeftArrow:
                        yPosition--;
                    break;
                case ConsoleKey.RightArrow:
                        yPosition++;
                    break;
            }
        }

        static bool CheckWall (ConsoleKeyInfo playerMove, ref char[,] playGround, ref int xposition, ref int yPosition)
        {
            char newPositionUp = playGround[xposition - 1, yPosition];
            char newPositionDown = playGround[xposition + 1, yPosition];
            char newPositionLeft = playGround[xposition, yPosition - 1];
            char newPositionRight = playGround[xposition, yPosition + 1];

            bool notWall;

            if (playerMove.Key == ConsoleKey.UpArrow && newPositionUp != '*')
            {
                notWall = true;
            }
            else if(playerMove.Key == ConsoleKey.DownArrow && newPositionDown != '*')
            {
                notWall = true;
            }
            else if(playerMove.Key == ConsoleKey.LeftArrow && newPositionLeft != '*')
            {
                notWall = true;
            }
            else if (playerMove.Key == ConsoleKey.RightArrow && newPositionRight != '*')
            {
                notWall = true;
            }
            else
            {
                notWall = false;
            }

            return notWall;
        }
    }
}