I recently upgraded web project 1.1 to web application 2.0. After completing the upgrade wizard and performing the upgrade to web application operation, everything looked great. However, after closing and reopening Visual Studio, he insisted on treating the project as a website, not a web application, and there was no “upgrade to web application” option. I understand the differences between the two types of projects well, but does anyone have a clear understanding of the differences in csproj / sln / etc. files that tell Visual Studio what type of project does it have?
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