I am trying to RegisterClientScriptBlock in a method that is only called via an AJAX call. It doesn\'t appear to actually register the script on the page and I\'m guessing
If there's anyone else out there like myself, and the accepted answer STILL won't work for you, then look no further.
Check out this link - a simple class that pops a Javascript alert no matter if you're on page load, unload, AJAX request, etc:
WebMsgBox.Show("Your message here");