Error: «Could not load type MvcApplication»

Question

I am getting the error

Could not load type MvcApplication

when I try to run my website.

How to correct it?

Answer 1

I know there are lots of solutions to this already, but I thought I'll just mention what solved it for me.

My configuration was set to Debug. Changing it to Release did the trick for me.

Answer 2

I was getting this error because I was running the project despite some compile time errors. This I didn't notice.

Answer 3

In some circumstances, new projects you create are not by default set to build. If you right-click on your solution, choose Properties, and choose the Configuration Properties | Configuration node on the left and ensure your project has a checkmark under the Build column. In normal circumstances I've found this happens by default. In other circumstances (I happen to have a somewhat complex Web Api / Xamarin Android and iOS / Mvc 5 solution that exhibits this behavior) the checkmark isn't present.

This is related to the other answers -- if your web projet's assembly is unavailable, you get this error. But this might be a common scenario, especially since you do in fact compile your solution -- the project just doesn't get built.

Answer 4

This can also happen while running the project in visual studio if your IIS Express has/is hosting an old/different project using the same port assignment.

To fix this, you can change the port assignment for this project or close IIS Express.

Answer 5

What worked for me was restarting Visual Studio.

I tried manually rebuilding, performing a clean and rebuild, and deleting the bin folder all of which did not work. My output path was already set to bin\

Answer 6

If you changed a namespace make sure to right click and refactor.