Could not load type 'WebApp1._Default' in ASP.NET

Question

When I am running my ASP.NET application I will get an error

Server Error in \'/\' Application.

Parser Error Description: An error occurred during the

Answer 1

For me somehow the code-behind file got removed from the project. They showed up with a different icon in the solution explorer. I just had to expand the ASPX line to see the code behind and then right-click and add it to the project.