How to stop the cron job execution, if already running

[dweddyRaf]

hi all i am running a cron job for sending email in every one minuteproblem is that if first process take more than one minute second process start before first one complete and create problem in sending emails.how to prevent this situation ?i search and found this article and some question here also but all are related to php and i want to do this in my asp.net application http://abhinavsingh.com/blog/2009/12/how-to-use-locks-in-php-cron-jobs-to-avoid-cron-overlaps/please help me out thanks in advance