AJAX :: How To Dynamically Add ScriptManager To A WebUserControl

I had this problem: I created a WebUserControl that used som Ajax stuff - hence it needed a ScriptManager.

The problem was that I couldn't add it to the WebUserControls html code (the .ascx file) since the WebUserControl sometimes was placed into a parent page that already had a ScriptManager, and I couldn't add a ScriptManagerProxy since the parent page sometimes didn't had a ScriptManager.

Alot of people just use a ScriptManager on the MasterPage, but this fails if: one doesn't use a MasterPage or one uses iFrames etc. that uses stand alone aspx pages, like Thickbox might do...

Here's the solution:

in the WebUserControls code behind (.cs file), put this:

protected override void OnInit(EventArgs e)