"10 PRINT CHR$(205.5+RND(1)); : GOTO 10" C# version

maze.cs

        private readonly string[] _boxes = { "╱", "╲" };
        private string getBoxes(int max=10000)
        {
            var random = new Random();
            var sb = new StringBuilder();
            for (var x = 0; x < max; x++)
            {
                sb.Append(_boxes[random.Next(_boxes.Length)]);
            }
            return sb.ToString();
        }