Compilation error CS0016: Could not write to output file

Question

In Brief

When I attempt to browse my website, I get the following error message:

CS0016: Could not write to output file \'c:\

Answer 1

In case the above answers didn't fix it for you, check your environment variables (right-click on Computer -> Properties -> Advanced System Settings -> Advanced tab -> Environment Variables

Make sure the temp variables are pointing to a folder with all the necessary permissions. (full access for Network Service, IIS_IUSRS)

Note: don't check just the two variables at the top, look inside the scroll menu under System Variables. You might find the variables configured there too.