Hi jbisono ,
I am clear about your requirement now. You may need to write code specific to the child pages in the page _load event of the master page. So that it will be executed automatically for all child pages.
You can use Page.GetType().Name or other technique like
this to get the child page name in Master page and write the specifc code to it.
Alternatively you can create BasePage class and inherit all your child pages from this class.Override the OnLoad event in the BasePage and write code specific to the pages inherited from it.