bool[,] passible;
            
            using (var img = (Bitmap)Bitmap.FromFile("Data//maze.png"))
            {
                passible = new bool[img.Width, img.Height];
                
                for (int x = 0; x < img.Width; x++)
                {
                    for (int y = 0; y < img.Height; y++)
                    {
                        if (x < 60 && y < 60) continue;
                        passible[x, y] = (img.GetPixel(x, y).ToArgb() != Color.White.ToArgb());
                    }
                }
            }

            int width = passible.GetLength(0);
            int height = passible.GetLength(1);
            int curX = width - 2;
            int curY = 0;
            var path = new Stack<Point>();
            var searched = new bool[width, height];
            //int searchCount = 0;
            //int totalSearchCount = (width - 60) * (height - 60);

            while (true)
            {
                if (curX == 1 && curY == 640)
                    break;

                if (!searched[curX, curY])
                {
                    searched[curX, curY] = true;
                    path.Push(new Point(curX, curY));

                    //searchCount++;
                    //if (searchCount % 1000 == 0)
                    //{
                    //    Console.CursorLeft = 0;
                    //    Console.Write("{0:#0%}", (float)searchCount / (float)totalSearchCount);
                    //}
                }

                if (curY > 0 && passible[curX, curY - 1] && !searched[curX, curY - 1])
                {
                    curY--;
                    continue;
                }

                if (curY < height - 1 && passible[curX, curY + 1] && !searched[curX, curY + 1])
                {
                    curY++;
                    continue;
                }

                if (curX > 0 && passible[curX - 1, curY] && !searched[curX - 1, curY])
                {
                    curX--;
                    continue;
                }

                if (curX < width - 1 && passible[curX + 1, curY] && !searched[curX + 1, curY])
                {
                    curX++;
                    continue;
                }

                var lastPoint = path.Pop(); // <<< "stack empty" exception thrown
                curX = lastPoint.X;
                curY = lastPoint.Y;
            }

            using (var img = (Bitmap)Bitmap.FromFile("Data//maze.png"))
            {
                foreach (var point in path)
                    img.SetPixel(point.X, point.Y, Color.Blue);

                img.Save("Data//maze_solved.png", ImageFormat.Png);
            }

            Console.CursorLeft = 0;
            Console.WriteLine("Done!");