Jun 01, 2015 09:46 AM|Siva Krishna Macha|LINK
Hi, thanks for the help but i still get the same error.
Please make sure that the "web.config" file contains the providerName attribute as mentioned by oned_gk.
As long as you have that attribute in your application's web.config file, you shouldn't get the error.
There is also possibility if you have duplicate entries with the same key in config files or, if you have multiple web.config files (per folder) - you would need to make sure the corresponding web.config file has the proper provider name as mentioned above.
Hope this helps.