Turn pictureboxes into an image

        /// <summary>
        /// using a List of Bitmaps as input a Bitmap patchword is returned 
        /// </summary>
        /// <returns>Bitmap</returns>
        public static Bitmap getMosaicBitmap(int imagesPerRow)
        {

            try
            {

                List<bitmap> imageItems = bitmaps;
                int imgCount = imageItems.Count;
                int imagesX;
                int xCount = 1;
                int xPos = 0;
                int yPos = 0;

                //let's save some image real estate if we can
                //if there are less images than wil fit into one row - trim the row size
                if (imgCount < imagesPerRow)
                {
                    imagesX = imgCount;
                }
                else
                {
                    imagesX = imagesPerRow;
                }

                //get the width and height of the images()images must hasve same width and height)
                int width = imageItems[0].Width;
                int height = imageItems[0].Height;

                //row count is rounded down count of images divided by columns
                int rows = (int)Math.Floor((decimal)imgCount / (decimal)imagesX);

                //if there is a remainder in dividing the count of images by columns
                //add an extra row to the row count
                bool remainder = decimal.Remainder((decimal)imgCount, (decimal)imagesX) > 0m;
                if (remainder) rows++;

                //we now know the dimensions of the Bitmap so let's create it
                Bitmap mosaicImage = new System.Drawing.Bitmap(imagesX * width, rows * height);

                using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(mosaicImage))
                {

                    //fill the mosaic in black first
                    g.Clear(System.Drawing.Color.Black);

                    for (int i = 0; i < imgCount; i++)
                    {

                        //iterate through images adding to mosaic
                        //images are added from let to right then down one and row left to right etc.
                        g.DrawImage(imageItems[i], new System.Drawing.Rectangle(xPos, yPos, imageItems[i].Width, imageItems[i].Height));

                        xCount++;

                        if (xCount > imagesX)
                        {
                            xPos = 0;
                            xCount = 1;
                            yPos = yPos + height;

                        }
                        else
                        {
                            xPos = xPos + width;
                        }

                    }

                    imageItems.Clear();
                    return mosaicImage;


                }



            }

            catch
            {
                return null;
            }

        }

</bitmap>