เกิดปัญหา out of memory system.drawing ณ ใช้งานฟังก์ชั่น ResizeImg

public void ScaleImage()
        {
            using (MemoryStream ms = new MemoryStream())
            {
                using (FileStream fs = new FileStream(sourcePath, FileMode.Open))
                {
                    Bitmap bmp = (Bitmap)Image.FromStream(fs);
                    SaveTemporary(bmp, ms, 100);

                    clsLog.Info("ScaleImage Before / ms.Length = " + ms.Length);
                    while (ms.Length < 0.9 * allowedFileSizeInByte || ms.Length > allowedFileSizeInByte)
                    {
                        double scale = Math.Sqrt((double)allowedFileSizeInByte / (double)ms.Length);
                        ms.SetLength(0);
                        bmp = ScaleImage(bmp, scale);
                        SaveTemporary(bmp, ms, 100);

                        clsLog.Info("ScaleImage Process / ms.Length = " + ms.Length);
                    }

                    clsLog.Info("ScaleImage After / ms.Length = " + ms.Length);

                    if (bmp != null)
                        bmp.Dispose();

                    SaveImageToFile(ms);

                    fs.Dispose();
                    fs.Close();
                }

                ms.Dispose();
                ms.Close();
            }
        }