public static void ConvertToJPG(String FileName,String NewFileName="") {
      FileInfo fi;
      try {
        if (NewFileName=="")
          NewFileName = FileName.Replace(Path.GetExtension(FileName), ".jpg");
        if (Path.GetExtension(FileName).ToLower() != ".jpg"){
          Bitmap bmp = new Bitmap(@FileName);
          ImageCodecInfo jgpEncoder = GetEncoder(ImageFormat.Jpeg);

          Encoder myEncoder =Encoder.Quality;
          EncoderParameters myEncoderParameters = new EncoderParameters(1);
          EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, 100L);
          myEncoderParameters.Param[0] = myEncoderParameter;
          //==========
          bmp.Save(NewFileName, jgpEncoder, myEncoderParameters);
          bmp.Dispose();
        } else {
          fi = new FileInfo(@FileName);
          fi.CopyTo(NewFileName);
        }
        fi = new FileInfo(@FileName);
        fi.Delete();
      } catch (Exception ex) {
        SetLog("ConvertToJPG",ex.Message+" || "+FileName+" || "+NewFileName);
      }
    }