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I have an application that I originally created targetting NET 3.5 framework. &nbsp;This morning I changed the target to .NET 4 and also changed it within IIS. &nbsp;I uploaded the new new web.config file, opened my browser and attempted to view my Default.aspx webpage, however I get a message of &quot;The page cannot be found&quot;. &nbsp; How can I fix this? 
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I have an application that I originally created targetting NET 3.5 framework.  This morning I changed the target to .NET 4 and also changed it within IIS.  I uploaded the new new web.config file, opened my browser and attempted to view my Default.aspx webpage, however I get a message of "The page cannot be found".   How can I fix this? 

&quot;The page cannot be found&quot; after changing target framework to 4.0

The successor to Active Server Pages, ASP.NET websites utilize the .NET framework to produce dynamic, data and content-driven web applications and services. ASP.NET code can be written using any .NET supported language. As of 2009, ASP.NET can also apply the Model-View-Controller (MVC) pattern to web applications

ASP.NET

IIS is Internet Information Services, the web server included with Windows Server operating systems. All current versions are built on a modular architecture; modules can be added or removed individually so that those required for specific functionality are installed. The full installation of IIS includes HTTP, security, content, compression, caching, logging and diagnostics.

&quot;The page cannot be found&quot; after changing target framework to 4.0

"The page cannot be found" after changing target framework to 4.0