public void Commit(string sessionKey)
        {
            //encrypt login and password
            string loginName = "";
            string pass = "";
            getloginAndPass(UserId, ref loginName, ref pass);
            string _url = getWSUrl(this.Url);

            RevisionLog.Instance.AddRevisionEntry(this.GetType(), "ExtractRevisions", "Committing changes", LogItemEntryType.Information);

            RepositoryWebservice repo = new RepositoryWebservice(_url);
            repo.Commit(sessionKey, loginName, pass);
            repo.Dispose();
        }