Good.
What I need is to execute a function every Monday, this function will clean a folder with images. I already know how to clean the folder, I just need to know how to schedule that function to run every Monday. The environment is MVC5 .NET Visual Studio 2015.
I appreciate your help.
ASP.NET in general and ASP.NET MVC5 in particular are technologies for developing web applications. What you are proposing has nothing to do with a web application.
In this case, what I would do is create a scheduled task that runs every Monday.