Bookmark Contains Function. Determines whether the list contains a specific Bookmark. ABCpdf .NET PDF Library. From ABCpdf .net previous page next page Contains Function Determines whether the list contains a specific Bookmark. Syntax [C#] bool Contains(Bookmark value) [Visual Basic] Function Contains(value As Bookmark) As Boolean Params Name Description value The object to locate. return True if the object is found, otherwise false. Notes Determines whether the Collection contains a specific Bookmark. Example None. previous page start next page