<%@ WebHandler Language="C#" Class="MyNamespace.robotshandler" %>
Disallow: /practice-manual/redirect.cfm

using System;
using System.Web;

namespace Dchs {

    public class robotshandler: IHttpHandler {

        public void ProcessRequest (HttpContext context) {

            context.Response.ContentType = "text/plain";
            context.Response.Write("User-agent: *\n");

            if (context.Request.ServerVariables["Https"]=="off"){
                // HTTP
                context.Response.Write("Disallow: /_mm/\n");
                context.Response.Write("Disallow: /_notes/\n");
                context.Response.Write("Disallow: /_baks/\n");
                context.Response.Write("Disallow: /MMWIP/\n");
                context.Response.Write("Disallow: /CFIDE/\n");
                context.Response.Write("Disallow: /adoption/education/intercountry/feedback/\n");
                context.Response.Write("Disallow: /partners/documents/licensing-manual-p2-1-tracked-changes.pdf\n");
                context.Response.Write("User-agent: googlebot\n");
                context.Response.Write("Disallow: *.csi\n");
            } else {
                // HTTPS
                context.Response.Write("Disallow: /");
            }
        }

        public bool IsReusable {
            get {return false;}
        }
    }
}