In MVC projects you have to create views inside controller class for performing tasks.

While creating views you also have to create their HTML designs for separate views in a single controller or in different controllers.

So what you do is first create view definition in the controller class

public ActionResult Index()
        {
            try
            {

                Details objectAssignmentModel = new Details();

                objectAssignmentModel.Category = new SelectList(Enum.GetValues(typeof(Common.Category)).Cast<Common.Category>().Select(v => new SelectListItem
                {
                    Value = v.ToString(),
                    Text = ((int)v).ToString()
                }).ToList(), "Value", "Text");

                objectAssignmentModel.Country = new SelectList(Enum.GetValues(typeof(Common.Country)).Cast<Common.Country>().Select(v => new SelectListItem
                {
                    Text = v.ToString(),
                    Value = ((int)v).ToString()
                }).ToList(), "Value", "Text");

                objectAssignmentModel.Hobbies = new SelectList(Enum.GetValues(typeof(Common.Hobbies)).Cast<Common.Hobbies>().Select(v => new SelectListItem
                {
                    Text = v.ToString(),
                    Value = ((int)v).ToString()
                }).ToList(), "Value", "Text");




                return View(objectAssignmentModel);
            }
            catch (Exception)
            {

                throw;
            }



        }

Now HTML needs to be generated which gets displayed when this view gets invoked by the application.

@{
    ViewBag.Title = "Contact";
}
<h2>@ViewBag.Title.</h2>
<h3>@ViewBag.Message</h3>

<address>
    One Microsoft Way<br />
    Redmond, WA 98052-6399<br />
    <abbr title="Phone">P:</abbr>
    425.555.0100
</address>

<address>
    <strong>Support:</strong>   <a href="mailto:Support@example.com">Support@example.com</a><br />
    <strong>Marketing:</strong> <a href="mailto:Marketing@example.com">Marketing@example.com</a>
</address>

This view contains both the .cs file and the .html file so that's why it is called .cshtml file