Collection<SvnLogEventArgs> list;
Client.GetLog("svn://1.2.3.4/my/path", new SvnLogArgs(new SvnRevisionRange(new SvnRevision(fromTime), new SvnRevision(SvnRevisionType.Head))), out list);

Client.GetLog(new Uri("svn://1.2.3.4/my/path"), new SvnLogArgs(new SvnRevisionRange(new SvnRevision(fromTime), new SvnRevision(SvnRevisionType.Head))), out list);