<%@ WebService Language="C#" Class="WebService1" %>

using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Collections.Generic;
using System.Xml.Linq;
using System.Linq;
using System.Globalization;
using System.Threading;

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
[System.Web.Script.Services.ScriptService]
public class WebService1 : System.Web.Services.WebService {

	private class CalendarItem {
		public string Title { get; set; }
		public string Link { get; set; }
	}

	[WebMethod]
	public IEnumerable<CalendarItem> GetCalendarItems() {
		XDocument document1 = XDocument.Load("some_rss_url");
		var items = from item in document.Descendants("entry")
			   select new CalendarItem {
				   Title = item.Element("title").Value,
				   Link = item.Element("link").Attribute("href").Value
               };
		return items;
	}
}