Add ScriptManager to Page Programmatically?

Question

I am developing a WebPart (it will be used in a SharePoint environment, although it does not use the Object Model) that I want to expose AJAX functionality in. Because of t

Answer 1

I used this code in custom web controls (.cs) that contain update panels.

protected override void OnInit(EventArgs e)
{
    //...
    if (ScriptManager.GetCurrent(this.Page) == null)
    {
        ScriptManager scriptManager = new ScriptManager();
        scriptManager.ID = "scriptManager_" + DateTime.Now.Ticks;
        Controls.AddAt(0, scriptManager);
    }
    //...
}