PUT or DELETE verb in ASP.NET MVC on HTML form
[HttpGet]
public ActionResult Register()
{
    return View();
}

[HttpPut]
public ActionResult Register(string username, string password)
{
    // Registering user
    return View();
}

<form action='@Url.Action("Register", "User")' method="post">
<div class='field'>
    <label for='username'>
        Username:
    </label>
    <input type='text' id='username' name='username' maxlength='100' />
</div>
<div class='field'>
    <label for='password'>
        Password:
    </label>
    <input type='password' id='password' name='password' maxlength='50' />
</div>
</form>

public static void RegisterRoutes(RouteCollection routes)
{
     SimplyRestfulRouteHandler.BuildRoutes(routes);
}

<input type="hidden" name="_method" value="put" />