Converting a .ics file to JSON, parsing it and using the data

gistfile1.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Net;
using System.Threading.Tasks;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace YourNamespace
{
    public class YourClass
    {
        public async Task<string> YourMethod()
        {
            //Prepare url
            string calUrl = "http://spacexstats.com/calendar.php?launch=all";
            string conversionUrl = String.Format("http://ical-to-json.herokuapp.com/convert.json?url={0}", calUrl);

            //Prepare web request
            HttpWebRequest req = WebRequest.Create(conversionUrl) as HttpWebRequest;
            req.Method = "GET";

            try
            {
                //Get request
                using (StreamReader reader = new StreamReader((await req.GetResponseAsync()).GetResponseStream()))
                {
                    //Get data
                    string data = await reader.ReadToEndAsync();

                    //Deserialize data into our ical class
                    List<iCalendar> calendars = JObject.Parse(data).GetValue("calendars").ToObject<List<iCalendar>>();

                    //Get first calendar
                    var calendar = calendars.FirstOrDefault();

                    //Ensure calendar is not null
                    if (calendar != null)
                    {
                        //Get the first event ordered by start date
                        var calEvent = calendar.Events.OrderBy(x => x.Start.Value).FirstOrDefault();

                        //Ensure event is not null
                        if (calEvent != null)
                        {
                            // TODO: Check if stamp, start and end have values ( if(calEvent.Start.HasValue) { doSomething() } )

                            //"Event found. Summary: AsiaSat 6 Launch. Description: AsiaSat 6 is a communications satellite being launched for Asia Satellite Telecommunications Company Ltd. Once in orbit, it will be renamed AsiaSat 6 / Thaicom 7.. Start Date: 8/26/2014 11:50:00 PM. End Date: 8/27/2014 12:50:00 AM."
                            return String.Format("Event found. Summary: {0}. Description: {1}. Start Date: {2}. End Date: {3}.", calEvent.Summary, calEvent.Description, calEvent.Start.Value, calEvent.End);
                        }
                        else
                        {
                            return "No events found.";
                        }
                    }
                    else
                    {
                        return "No calendars found.";
                    }
                }
            }
            catch (WebException webex)
            {
                // TODO: Handle exception
                return webex.Message;
            }
            catch (Exception ex)
            {
                // TODO: Handle exception
                return ex.Message;
            }
        }

        private class iCalendar
        {
            public string Version { get; set; }
            public string ProdId { get; set; }
            public List<iCalendarEvent> Events { get; set; }
        }

        private class iCalendarEvent
        {
            private string _dtStamp { get; set; }
            private string _dtStart { get; set; }
            private string _dtEnd { get; set; }

            [JsonProperty("uid")]
            public string UniqueId { get; set; }
            public string DTStamp
            {
                get
                {
                    return _dtStamp;
                }
                set
                {
                    _dtStamp = value;
                    Stamp = this.ParseStringToDate(value);
                }
            }
            public string DTStart
            {
                get
                {
                    return _dtStart;
                }
                set
                {
                    _dtStart = value;
                    Start = this.ParseStringToDate(value);
                }
            }
            public string DTEnd
            {
                get
                {
                    return _dtEnd;
                }
                set
                {
                    _dtEnd = value;
                    End = this.ParseStringToDate(value);
                }
            }
            public DateTime? Stamp { get; set; }
            public DateTime? Start { get; set; }
            public DateTime? End { get; set; }
            public string Summary { get; set; }
            public string Description { get; set; }
            public string Location { get; set; }

            private DateTime? ParseStringToDate(string value)
            {
                //Ensure value exists
                if (!String.IsNullOrEmpty(value))
                {
                    var date = new DateTime();

                    //This is a simple datetime parser. According to the iCal standard, a DateTime string ending in 'Z' indicates that the datetime is in UTC rather than local time. This code assumes the date is in UTC.
                    if (DateTime.TryParseExact(value.ToLower().Replace("t", " ").Replace("z", ""), "yyyyMMdd HHmmss", CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal, out date))
                    {
                        return date;
                    }
                    else
                    {
                        return null;
                    }
                }
                else
                {
                    return null;
                }
            }
        }
    }
}

Is it possible to use a ical url instead of a ics file? And write it in a json file or js?