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?

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