public UriYoutubePlaylists(String address, ParamYoutube arg)
     : base(address, arg)
 {
 }
 public UriYoutubeAuthor(String address, ParamYoutube pars)
     : base(address, pars)
 {
 }
 public UriYoutubeBase(String address, ParamYoutube pars)
 {
     _uri = new Uri(address); _pars = pars;
 }
 public UriYoutubeBase(String address)
 {
     _uri = new Uri(address); _pars = ParamYoutube.Empty;
 }
 public UriYoutubeFeed(String address, ParamYoutube arg)
     : base(address, arg)
 {
 }
 public UriYoutubeEntry(String address, ParamYoutube pars)
     : base(address, pars)
 {
 }