Recently I upgraded my solution to VS 2010. My solution contained almost 30 projects. After upgrading when I ran the solution for the first time I got following error:
Unrecognized configuration section system.web.extensions when upgrading to ASP.NET 4.0
After some googling it was certain that the error was due to upgrade but I could not find exact solution. Then I opened my machine.config file (located at C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Config).
It had the "system.web.extensions" section. Suddenly I noticed that the entire text in the machine.config was in small letters(system.web.extensions) whereas in my projects' we.config, the first letter of every word was in capital letters. (System.Web.Extensions). When I changed my web.config to small case, the solution worked.
One complete day wasted on such small silly thing!!!!
Unrecognized configuration section system.web.extensions when upgrading to ASP.NET 4.0
After some googling it was certain that the error was due to upgrade but I could not find exact solution. Then I opened my machine.config file (located at C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Config).
It had the "system.web.extensions" section. Suddenly I noticed that the entire text in the machine.config was in small letters(system.web.extensions) whereas in my projects' we.config, the first letter of every word was in capital letters. (System.Web.Extensions). When I changed my web.config to small case, the solution worked.
One complete day wasted on such small silly thing!!!!
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