MVC WebFormViewEngine and Security

Question

Hello all,

Asp.net webformview engine is quite flexible and easy to be used in the projects.

I have been facing with a small problem recently. SECURITY!

I want my users to design the web pages in front. BUT!! with a small code, the people who have bad intention, can get the content of my dll files in bin folder.

e.g.

<%
        System.IO.FileStream fileStream = new System.IO.FileStream(Server.MapPath("\\bin") + "\\TestReader.dll", System.IO.FileMode.Open, System.IO.FileAccess.Read);
        try
        {
            System.IO.StreamReader sr = new System.IO.StreamReader(fileStream);
            string s = sr.ReadToEnd();
            Response.Write(s);
            sr.Close();
        }
        finally
        {
            fileStream.Close();
        }
    %>

The code above gives me the content of the file. What I want is to forbid some namespaces that can be used in webforms! Is it possible to do that?

Or any other advise?? To tell the truth, I do not want to use any other viewengine. Unless I can do what I want, I will use another viewengine.

Thanks