LinqToSQL - Row Not found or Changed

Last week, I was asked to help on an exception on an ASP.NET page, which was occurring intermittently. The exception was Message: Sys.WebForms.PageRequestManagerServerErrorException: Row not found or changed. Initially, I started with Page Requests / Call Stack etc. but nothing seemed obvious. I started looking for other references at Google/ StackOverflow etc.. and finally found it as…

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