Let's start with a very simple variable. The following can be entered in a razor view file.

@{
    string sample = "Hello World";
}

@Html.Raw(sample)

This would produce the following.

Text can be passed from the Controller to a View using ViewBag.Message.

CONTROLLER

public ActionResult Index()
{
    ViewBag.Message = "Hello World";
    return View();
}

VIEW

@ViewBag.Message

This would produce the following.

To pass more than one variable to the view, do the following.

CONTROLLER

public ActionResult Index()
{
    var abc = "Hello";
    ViewBag.abc = abc;

    var xyz = "World";
    ViewBag.xyz = xyz;

    return View();
}

VIEW

@Model.site
@Model.username

@ViewBag.abc
@ViewBag.xyz

This would produce the following.