MS MVC 3 custom html helper that recieve as parameter the model?

I've written a custom html helper in MVC 3 that receive as a 开发者_开发知识库parameter the model my view is based on. What I'm wondering is: can a custom helper access the model without receiving it as a parameter? Is there any way to avoid calling it like this: @html.MyCustomHelper(Model)?

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you can use the ViewData property of HtmlHelper to access the model

helper.ViewData.Model