Visual Studio 2015 keeps running old code/build

I am currently working on a web project and I am having a problem where Visual Studio 2015 is not running the latest build. I know that there are already some questions about this problem but I still could not fix this issue.

I have tried the following but still did not make any improvements:

• Closing Visual Studio
• Closing the project
• Clean and Re-build solution
• Deleting the bin folder
• Deleting the debug folder
• Tools -> Options -> Projects and Solutions -> Build and Run: "On Run, when projects are out of date" set to "Always Build"

Any help, please?