Question

I have 2 master page: master1.master, master2.master
And i have another nested master page nestedMaster.master that nested from master1.master.

Question:
How can i change nested master page file of nestedMaster.master at runtime?

Answer 1

Handle the Page_PreInit event of content page and set MasterPageFile property.

 public void Page_PreInit()
 {
   this.Master.MasterPageFile = "~/master2.master";
 }