public static InternationalMusicLibrary GetInternationalMusicLibraryInstance()
{
if (instance == null)
{
lock (obj)
{
if (instance == null)
{
instance = new InternationalMusicLibrary();
}
}
}
return(instance);
}
public AppMusicLibrary()
{
songs = new List <Song>();
internationMusicLibrary = InternationalMusicLibrary.GetInternationalMusicLibraryInstance();
internationMusicLibrary.Subscribe(this);
}