C# Checkboxes with cshtml in a web application (MVC)

Help! I want to implement Checkboxes in my Web application and I have trouble doing it. I put Checkboxes in my view file and they are shown on my Webpage. Now I want to modify them and want to write some code. I thought about writing a class in my controller but how do I contact the Checkboxes? All tutorials about Checkboxes I can find are with wondows forms and there it is obvious where to write the Checkbox code. PS: What is the best way to implement Checkboxes? asp? razor? usual html?

Regards - IP