Local & Regional October Events

Local Events
10/1: ON SQL User Group (www.ohionorthsqlserverug.org)
10/8: Cleveland .NET User Group (www.bennettadelson.com/ComingEvents.aspx) 
10/10: Cleveland Riak (http://www.meetup.com/Cleveland-Riak)
10/12: Techie Family Meet & Play (http://www.meetup.com/UX-Akron/events/141530432/)
10/15: Cleveland WPF User Group (www.ClevelandWPF.info) 
10/16: Software Engineering 101 (https://swe101october2013.eventbrite.com/)
10/16: Hudson Software Craftsmanship (http://hudsonsc.com) 
10/22: Cleveland C#/VB.Net User Group (www.clevelanddotnet.info) 
11/22: Build Highlights (https://msevents.microsoft.com)
12/4: Monetization of Real-World Windows Apps (https://msevents.microsoft.com)

Regional Events
10/23: Azure Dev Camp – Columbus, OH (https://msevents.microsoft.com/)
11/2: CODODN – (http://cododn.azurewebsites.net)
11/2: SQL Saturday: Kalamazoo, MI (http://www.sqlsaturday.com/256/eventhome.aspx)
11/9: Raleigh Code Camp (http://codecamp.org/)
11/20: Windows 8 & Windows Phone Hands-on-Lab (https://msevents.microsoft.com)
11/21-22: Dog Food Conference: (http://dogfoodcon.com)
12/7: SQL Saturday: Washington DC (http://www.sqlsaturday.com/233/eventhome.aspx)
4/26: Kalamazoo X: (http://kalamazoox.org)

Object reference not set to an instance of an object when using HTMLEditorExtender

Question: While working on an AJAX-enabled application, I got "Object reference not set to an instance of an object when using HTMLEditorExtender". How do I fix this?

Answer: Add a register page directive referencing the AjaxControlToolKit. This is in addition to the steps mentioned at http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/HTMLEditorExtender/HTMLEditorExtender.aspx