Master Page in ASP.NET

 yes, we can on Page_PreInit of a web page..

 void Page_PreInit(Object sender, EventArgs e)
 {
    this.MasterPageFile = "~/MasterPage1.master";
 }

 

Hey man, I didn't try it but it seems that you can assign a master page. Check this site 

http://msdn.microsoft.com/en-us/library/c8y19k6h.aspx

There is an example as well..

void Page_PreInit(Object sender, EventArgs e) {     this.MasterPageFile = "~/NewMaster.master"; }