C#

private void button3_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog fbd = new FolderBrowserDialog();
            if (fbd.ShowDialog() == DialogResult.OK)
            {
                Xal.Clear(); // ArrayList               
                getDirs(fbd.SelectedPath); // To Fill AL
                string[] tmp_filePaths = (string[])Xal.ToArray(typeof(string));
                for (int a = 0; a < tmp_filePaths.Length; a++)
                {
                    if (!tmp_filePaths[a].EndsWith(".txt"))
                    {
                        Image tmp_image = Image.FromFile(tmp_filePaths[a]); //<< Error Line (out of memory)
                        int newwidth = roundToNearestPixel(tmp_image.Width);
                        int newheight = roundToNearestPixel(tmp_image.Height);
                        Bitmap tmp_bmp = new Bitmap(newwidth, newheight);
                        Graphics tmp_gra = Graphics.FromImage(tmp_bmp);
                        tmp_gra.DrawImage(tmp_image, 0, 0, newwidth, newheight);
                        tmp_bmp.Save(@"D:\texts\" + Path.GetFileNameWithoutExtension(tmp_filePaths[a]) + ".png", System.Drawing.Imaging.ImageFormat.Png);
                        tmp_gra.Dispose();
                    }
                }
            }            
        }

        short[] dimensions = new short[] { 64, 128, 256, 512, 1024, 2048, 4096 };
        int roundToNearestPixel(int value)
        {
            int result;
            if (value <= 64)
            {
                result = 64;
                return result;
            }
            int pointer = 0;

            for (int a = 0; a < dimensions.Length; a++)
            {
                if (dimensions[a] >= value)
                {
                    pointer = a;
                    break;
                }
            }
            int shortdistance = value - dimensions[pointer - 1];
            int largedistance = dimensions[pointer] - value;
            if (shortdistance < largedistance)
                result = dimensions[pointer - 1];
            else
                result = dimensions[pointer];
            return result;
        }