serialize / deserialize 2d bool array

public static byte[] SerializeMap(bool[,] map) {

            byte[] arr = new byte[map.Length + 8];
            byte[] widthBytes = BitConverter.GetBytes(map.GetLength(0));
            byte[] heigthBytes = BitConverter.GetBytes(map.GetLength(1));
            arr[0] = widthBytes[0];
            arr[1] = widthBytes[1];
            arr[2] = widthBytes[2];
            arr[3] = widthBytes[3];
            arr[4] = heigthBytes[0];
            arr[5] = heigthBytes[1];
            arr[6] = heigthBytes[2];
            arr[7] = heigthBytes[3];

            int position = 8;

            for (int x = 0; x < map.GetLength(0); x++) {
                for (int y = 0; y < map.GetLength(1); y++) {
                    arr[position] = BitConverter.GetBytes(map[x, y])[0];
                    position++;
                }
            }

            return arr;

        }

        public static bool[,] DeserializeMap(byte[] arr) {

            int width = BitConverter.ToInt32(arr, 0);
            int heigth = BitConverter.ToInt32(arr, 4);
            bool[,] map = new bool[width, heigth];
            int position = 8;

            for (int x = 0; x < width; x++) {
                for (int y = 0; y < heigth; y++) {
                    map[x, y] = BitConverter.ToBoolean(arr, position);
                    position++;
                }
            }
            return map;

        }