<%@ language="C#" %>

<%

    string jontycat = "Jonty built this in ASP.NET!";
    string requestURL;
    string secondParam;

    requestURL = Request.QueryString["param"];
    secondParam = Request.QueryString["two"];

    if(requestURL == null && secondParam == null)
    {
        Response.Write("Both params are empty, fill 'em");
    }
    else
    {
        if(requestURL == null || secondParam == null)
        {
            Response.Write("One of your params are null");
        }
        else
        {
            Response.Write(jontycat + requestURL + secondParam);
        }
    }
%>