Razor: How to fill a textarea?

I feel stupid asking this question, but I'm totally blank here :)

In my controller i have this: ViewBag.TextareaHTML = "test"

How do I in my view fill my... ... with this ViewBag.T开发者_StackOverflow中文版extareaHTML value?

@Html.TextArea("name", (string)ViewBag.TextareaHtml)