View page generates RuntimeBinderException, works anyway - razor

Question

I am trying to use ServiceStack Razor in my project. I set up a very simple DTO:
namespace ModelsWeb.Diagnostics
{
[Route("/echo")]
[Route("/echo/{Text}")]
public class Echo
{
public string Text { get; set; }
}
public class EchoResponse
{
public ResponseStatus ResponseStatus { get; set; }
public string Result { get; set; }
}
}
And a service to go with it:
namespace Rest.Services
{
public class EchoService : Service
{
public object Any(Echo request)
{
return new EchoResponse {Result = request.Text};
}
}
}
Note that the DTO and the service are in different namespaces. This is because I'm building two applications at once -- the server and the thick client -- and I put all the DTOs in a separate class library that they both depend on. This way, the client can reference just that class library, and no other server-side code. I am using Razor to provide a Web interface to some of the server functionality.
Anyway, I also wrote a simple view for my Echo service:
#using ServiceStack.Razor
#using ModelsWeb.Diagnostics
#inherits ViewPage<EchoResponse>
#{
ViewBag.Title = "Echo Response";
Layout = "BasePage";
}
<h1>You typed: #Model.Result</h1>
When I type "http://localhost:62061/echo/hello2" into the browser, I get an error on my log:
Cannot implicitly convert type 'ServiceStack.Razor.Compilation.RazorDynamicObject'
to 'ModelsWeb.Diagnostics.EchoResponse'
However, the template still works, and I see the expected result in the browser. What's going on here ? Am I doing anything wrong ? If not, how can I suppress this exception ?