Masjid's library as part of the Masjid or not

Q 1: Is the library of a Masjid (mosque) considered part of the Masjid even though it is not inside the main Prayer hall? Is the courtyard of the Masjid regarded as part of it? In other words, does it entail the rulings of Masjids, such as the desirability of offering Tahiyyat-ul-Masjid (two-unit Prayer to salute the mosque), the prohibition of selling inside it, and so on?

A: All that is inside the premises of a Masjid, such as its courtyard or library, is part of it and entails its rulings. Nevertheless, it is not permissible for a person to offer Salah (Prayer) in the Masjid's courtyard or library and abandon performing the congregational Salah among the rows behind the Imam (the one who leads congregational Prayer).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.