How do I detect if a scriptmanager is on the page?

Question

How do I detect if a scriptmanager is loaded on a page? Some aspx pages have it and others don't and I need a user control to understand this so that it can either load it if needed and also for dealing with viewstate.

Answer 1

Call ScriptManager.GetCurrent(page), which will return null if there's no ScriptManger on the page.