I have a master page with name MasterPage.master.
Now I want to create another master page (MasterPage2.master) that its MasterPageFile is MasterPage.master,
But when I create MasterPage2 and then create a webform from MasterPage2, there isn’t any ContentPlaceHolder in this webform.
Please explain for me…
What you’re looking for is nested master pages.
Google it and you’ll have a ton of tutorials. Top 2 results from google:
http://msdn.microsoft.com/en-us/library/x2b3ktt7(v=vs.100).aspx
http://msdn.microsoft.com/en-us/library/bb547109(v=vs.100).aspx