Создание папки в библиотеке и добавление в нее файла из FileUpload

if (FileUpload1.HasFile != false)
                {
                    byte[] contents = GetFileContents(FileUpload1.PostedFile);

                    if (contents != null)
                    {
                        String url =
                        web.Lists[nameListDoc].RootFolder.ServerRelativeUrl.ToString();
                        SPFolderCollection oFolders = web.GetFolder(url).SubFolders;
                        oFolders.Add(nameNewFolder);
                        string folderString = nameListDoc+ "/" + nameNewFolder;
                        SPFolder oFolder = web.GetFolder(folderString);
                        SPFileCollection oFiles = oFolder.Files;
                        oFiles.Add(FileUpload1.FileName, contents);
                    }
                }

private byte[] GetFileContents(HttpPostedFile postedFile)
        {
            HttpPostedFile file = postedFile;
            Stream oStream = file.InputStream;
            byte[] contents = new byte[oStream.Length];
            oStream.Read(contents, 0, (int)oStream.Length);
            oStream.Close();
            oStream.Dispose();
            return contents;
        }