enums.cs

// use in webmatrix
@{
    Helper.Fetch(url: "http://example.com", method: "GET"); 
}

@{
    Helper.Fetch(url: "http://example.com", method: HttpMethod.GET); // no intellisense or build protection
}

// regular code use, not webmatrix and not 4.0

Helper.Fetch("http://example.com", HttpMethod.GET); // better if intellisense exists
Helper.Fetch("http://example.com", "GET"); // magic stringy