Create iCal ics file with asp.net handler

Create-iCalendar.ashx

<%@ WebHandler Language="C#" Class="MyNamespace.iCalendar" %>
using System;
using System.Web;
namespace MyNamespace
{
 public class iCalendar: IHttpHandler 
 {
  
  public bool IsReusable
  {
   get
   {
    return true;
   }
  }

  string DateFormat
  {
    get
    {
      return "yyyyMMddTHHmmssZ"; // 20060215T092000Z
    }
  }
  
  
  public void ProcessRequest(HttpContext ctx)
  {

   #source   http://webdevel.blogspot.com/2006/02/how-to-generate-icalendar-file-aspnetc.html
   DateTime startDate = DateTime.Now.AddDays(5);
   DateTime endDate = startDate.AddMinutes(35);
   string organizer = "foo@bar.com";
   string location = "My House";
   string summary = "My Event";
   string description = "Please come to\\nMy House";
   
   ctx.Response.ContentType="text/calendar";
   ctx.Response.AddHeader("Content-disposition", "attachment; filename=appointment.ics");
   
   ctx.Response.Write("BEGIN:VCALENDAR");
   ctx.Response.Write("\nVERSION:2.0");
   ctx.Response.Write("\nMETHOD:PUBLISH");
   ctx.Response.Write("\nBEGIN:VEVENT");
   ctx.Response.Write("\nORGANIZER:MAILTO:" + organizer);
   ctx.Response.Write("\nDTSTART:" + startDate.ToUniversalTime().ToString(DateFormat));
   ctx.Response.Write("\nDTEND:" + endDate.ToUniversalTime().ToString(DateFormat));
   ctx.Response.Write("\nLOCATION:" + location);
   ctx.Response.Write("\nUID:" + DateTime.Now.ToUniversalTime().ToString(DateFormat) + "@mysite.com");
   ctx.Response.Write("\nDTSTAMP:" + DateTime.Now.ToUniversalTime().ToString(DateFormat));
   ctx.Response.Write("\nSUMMARY:" + summary);
   ctx.Response.Write("\nDESCRIPTION:" + description);
   ctx.Response.Write("\nPRIORITY:5");
   ctx.Response.Write("\nCLASS:PUBLIC");
   ctx.Response.Write("\nEND:VEVENT");
   ctx.Response.Write("\nEND:VCALENDAR");
   ctx.Response.End();
  }
 }
}