MVC :: Runtime Binder Exception When Using Anonymous Type In Untyped View?

I'm using MVC, and in the controller, I'm using a linq to objects query which returns an anonymous type:

var results = from ... select new { ... };

I then pass this information to an untyped view:

return View(results);

I try to iterate through the data in the view:

<% foreach (var entry in Model)%>

...

<%: Html.Encode(entry.MyProperty) %>

However, I get a RuntimeBinderException: 'object' does not contain a definition for 'MyProperty'. However, oddly, if I hover above entry with the mouse, it does actually have MyProperty in the popup window, and the value is what I would expect,(apparently, the Visual Studio IDE knows what type it is).I can get around this problem by using a linq query which uses an explicit type and a parameterless constructor of the form:

IQueryable<SearchResult> results = from ... select new SearchResult { ... };

and creating a view model class which encapsulates the SearchResult data, which is then returned to a strongly typed view. However, I don't understand what the problem is with the first method.