A Complete Guide to Writing Timer Jobs in SharePoint 2010

I wrote SharePoint time jobs many times in SP 2007 and SP 2010.

I read various articles on writing timer jobs.

The following article contains everything about writing timer jobs. 

A Complete Guide to Writing Timer Jobs in SharePoint 2010

https://www.simple-talk.com/dotnet/.net-tools/a-complete-guide-to-writing-timer-jobs-in-sharepoint-2010/

I recommend this article to new or experience timer job developers.