Problems publishing a website on smarterasp.net with csc.exe file included?

Question

I am using Microsoft Visual Studio 2015, I built a simple website with a C# contact form. When I compile and run on localhost it works perfectly fine. However, when I try to

Answer 1

The above solutions did not work for me and are not correct, since roslyn is not optional these days.

What worked was ensuring that the pool account had read & execute permissions on the root folder of the web application. You can find the account to grant this permission to by finding the Pool name your web app uses, then Application Pool -> pool name -> Advanced Settings -> Identity.

My VPS host uses non-standard directories for hosting as follows:

c:\home\web.app.name\wwwroot

The web.app.name folder needed the permission.