If you are working with MVC then one controller are given by MVC when we create a New Project i.e. Account Controller. In Account Controller, we have a Login action which provides the user with a login screen, then receives the user name and password back after the user submits the form:
We see in login action [HttpGet] is the first action and [HttpPost] and the second action, MVC clearly knows which action is which. When a user views a page, that's a GET request when a user submits a form, that's usually a POST request . HttpGet and HttpPost just restrict the action to the applicable request type.
We can also combine both request in an one action using below syntax: