I am a little forgetful have made it many times and can not find the code from the last time I made it how do I get it to resize more than one picture

i do like this

                   Guid imageName;
                   imageName = Guid.NewGuid();
                   string storePath = Server.MapPath("~") + "/MultipleUpload";
                    if (!Directory.Exists(storePath))
                        Directory.CreateDirectory(storePath);
                    hif.PostedFile.SaveAs(storePath + "/" + Path.GetFileName(hif.PostedFile.FileName));

                    string tempPath = "Gallery";
                    string imgPath = "Galleryt";
                    string savePath = Path.Combine(Request.PhysicalApplicationPath, tempPath);
                    string TempImagesPath = Path.Combine(savePath, imageName + hif.PostedFile.FileName);
                    string imgSavePath = Path.Combine(Request.PhysicalApplicationPath, imgPath);
                    string ProductImageNormal = Path.Combine(imgSavePath, "t__" + imageName + hif.PostedFile.FileName);
                    string extension = Path.GetExtension(hif.PostedFile.FileName);
                    switch (extension.ToLower())
                    {
                        case ".png": goto case "Upload";
                        case ".gif": goto case "Upload";
                        case ".jpg": goto case "Upload";
                        case "Upload": hif.PostedFile.SaveAs(TempImagesPath);
                            ImageTools.GenerateThumbnail(TempImagesPath, ProductImageNormal, 250, 350, true, "heigh");
                            Label1.Text = "";
                            break;
                    }