how to add master page in telephone directory

here i am going to show you that how to add master page in telephone directory and also you can learn how yo can make other page as a child page and also you can learn how to add master page in asp.net, what is master page in asp.net,how you can make simple telephone directory in asp.net, Make A Simple Phone Directory Website in asp.net,how to create phone book in asp.net,how to create simple asp.net website,telephone diary asp.net,how to make asp.net website,how to develop asp.net website,how to make dynamic website in asp.net