I'm converting a VS 2010 Web Site to a VS 2015 Web Application in C#. I have a Custom Control Project that is being accessed correctly now. However, I am getting 4000+ build errors on perhaps every one of them. Yet, all I do is open the .aspx page and build, and the errors go away.
I don't know if this was because the reference wasn't working when I ran the Convert to Web Application or not.
Is there anyway to refresh all of this without having to open every page?