What's a good way to do meta tags in asp.net mvc 3?

I currently have a master layout page with a default开发者_开发问答 title, and meta content. How can I override the title and meta content in child pages?

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I found a way that works for now. I'm wure it can be improved, but this is the closet thing to an ideal solution that I have come across.

In the controllers assign whatever meta info you need for that view.

ViewBag.Title = "some title";
ViewBag.MetaDescription = "some description";
etc...

and in the master layout page I do the following

   <title>@ViewBag.Title</title>    

    @if(ViewBag.MetaDescription != null)
    {
        <meta name="description" content="@ViewBag.MetaDescription" />
    }

    @if(ViewBag.MetaKeywords != null)
    {
        <meta name="keywords" content="@ViewBag.MetaKeywords" />
    }

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define a ContentPlaceHolder (@RenderSection in Razor) and fill it in the views that use the master page, using Content (@section in Razor).