在MVC中,如何返回字符串结果？

public ActionResult MyAction()
{
    string myString = "Hello, World!";
    return Content(myString);
}

@model string
@{
    ViewBag.Title = "MyAction";
}

<h2>MyAction</h2>
<div>
    @Html.Raw(Model)
</div>

public class MyModel
{
    public string MyString { get; set; }
}

public ActionResult MyAction()
{
    MyModel model = new MyModel();
    model.MyString = "Hello, World!";
    return View(model);
}

@model MyModel
@{
    ViewBag.Title = "MyAction";
}

<h2>MyAction</h2>
<div>
    @Html.Raw(Model.MyString)
</div>