diff --git a/README.md b/README.md
index 7863dac..140df53 100644
--- a/README.md
+++ b/README.md
@@ -301,6 +301,83 @@ class StubManager {
 
 }
 
+class LinqXmlSerialization {
+    - {static} string XMLPATH
+    - {static} string XMLFILEPLAYLISTS
+    - {static} string XMLFILEALBUMS
+    - {static} string XMLFILECUSTOMS
+    - {static} string XMLFILEINFOS
+    - {static} string XMLFILEARTISTS
+    + LinqXmlSerialization()
+    + void AddAlbum(Album album)
+    + void AddArtist(Artist artist)
+    + void AddCustomTitle(CustomTitle title)
+    + void AddInfoTitle(InfoTitle title)
+    + void AddPlaylist(Playlist playlist)
+    + List<Album> GetAlbums()
+    + List<Artist> GetArtists()
+    + List<CustomTitle> GetCustomTitles()
+    + List<InfoTitle> GetInfoTitles()
+    + List<Playlist> GetPlaylists()
+    + void RemoveAlbum(Album album)
+    + void RemoveArtist(Artist artist)
+    + void RemoveCustomTitle(CustomTitle title)
+    + void RemoveInfoTitle(InfoTitle title)
+    + void RemovePlaylist(Playlist playlist)
+    + void LoadSerialization()
+    + void SaveSerialization()
+    + void LoadPlaylists()
+    + void SavePlaylists()
+    + void LoadArtists()
+    + void SaveArtists()
+    + void LoadCustomTitles()
+    + void SaveCustomTitles()
+    + void LoadAlbums()
+    + void SaveAlbums()
+    + void LoadInfoTitles()
+    + void SaveInfoTitles()
+    + {static} Genre GetGenreByName(string genre)
+    + InfoTitle? GetInfoTitleByUrl(string url)
+    + Artist? GetArtistByName(string name)
+    + Album? GetAlbumByUrl(string url)
+    + CustomTitle? GetCustomTitleByUrl(string custom)
+    + void AddAlbums(List<Album> albumsList)
+    + void AddArtists(List<Artist> artistsList)
+    + void AddPlaylists(List<Playlist> playlistsList)
+    + void AddCustomTitles(List<CustomTitle> customTitlesList)
+    + void AddInfoTitles(List<InfoTitle> infoTitlesList)
+    + Playlist? GetPlaylistByUrl(string url)
+    + void UpdateCustomTitle(CustomTitle title, string name, string url, string info, string path)
+    + void UpdateCustomTitleByUrl(string url, string name, string newUrl, string info, string path)
+    + void UpdateInfoTitle(InfoTitle title, string name, string url, string info, Artist artist, string description, Genre genre)
+    + void UpdateInfoTitleByName(string url, string name, string newUrl, string info, Artist artist, string description, Genre genre)
+    + void UpdateInfoTitleByArtistName(InfoTitle title, string name, string url, string info, string artist, string description, Genre genre)
+    + void UpdateInfoTitleByNameByArtistName(string url, string name, string newUrl, string info, string artist, string description, Genre genre)
+    + void UpdateAlbum(Album album, string name, string url, Artist artist, string description, string info)
+    + void UpdateAlbumByUrl(string url, string name, string newUrl, Artist artist, string description, string info)
+    + void UpdateAlbumByArtistName(Album album, string name, string url, string artist, string description, string info)
+    + void UpdateAlbumByUrlByArtistName(string url, string name, string newUrl, string artist, string description, string info)
+    + void UpdatePlaylist(Playlist playlist, string name, string description, string url)
+    + void UpdatePlaylistByUrl(string url, string name, string description, string newUrl)
+    + void UpdateArtist(Artist artist, string name)
+    + void UpdateArtistByName(string name, string newName)
+    + void RemoveAlbums(List<Album> albumsList)
+    + void RemoveArtists(List<Artist> artistsList)
+    + void RemovePlaylists(List<Playlist> playlistsList)
+    + void RemoveCustomTitles(List<CustomTitle> customTitlesList)
+    + void RemoveInfoTitles(List<InfoTitle> infoTitlesList)
+    + boolean ExistsPlaylist(Playlist playlist)
+    + boolean ExistsPlaylistByUrl(string url)
+    + boolean ExistsAlbum(Album album)
+    + boolean ExistsAlbumByUrl(string url)
+    + boolean ExistsArtist(Artist artist)
+    + boolean ExistsArtistByName(string name)
+    + boolean ExistsCustomTitle(CustomTitle title)
+    + boolean ExistsCustomTitleByUrl(string url)
+    + boolean ExistsInfoTitle(InfoTitle title)
+    + boolean ExistsInfoTitleByUrl(string url)
+}
+
 Album --> "+ artist" Artist
 Album --> "- titles*" Title
 Playlist --> "- titles*" Title
@@ -322,5 +399,11 @@ StubManager --> "- stubPlaylist" StubPlaylist
 StubManager --> "- stubAlbum" StubAlbum
 StubManager --> "- stubInfoTitle" StubInfoTitle
 StubManager --> "- stubCustomTitle" StubCustomTitle
+LinqXmlSerialization <|-- IDataManager
+LinqXmlSerialization --> "- artists*" Artist
+LinqXmlSerialization --> "- albums*" Album
+LinqXmlSerialization --> "- playlists*" Playlist
+LinqXmlSerialization --> "- infotitles*" InfoTitle
+LinqXmlSerialization --> "- customtitles*" CustomTitle
 @enduml