How to create an Outlook Calendar folder on a computer that is running Exchange 2000 Server by using Visual C#

using System;

namespace WebDav
{
	class Class1
	{	
		public static void Main(String [] args)
		{
			try 
			{			
			MSXML2.XMLHTTP30 oXMLHttp = new MSXML2.XMLHTTP30();
			
                        // TODO: Replace with your new folder URL
			String sUrl = "http://ExchServer/public/MyApplication/NewFolder";
			// TODO: Replace the account and password			
			oXMLHttp.open("MKCOL", sUrl, false, @"UserDomain\UserAlias", "UserPassword"); 

			String sQuery;

			sQuery = "<?xml version='1.0'?>" + 
				"<a:propertyupdate xmlns:a='DAV:' " + 
				"xmlns:ex='http://schemas.microsoft.com/exchange/'>" + 
				"<a:set><a:prop>" + 
				"<ex:outlookfolderclass>IPF.Appointment</ex:outlookfolderclass>" + 
				"</a:prop></a:set>" + 
				"</a:propertyupdate>";

			oXMLHttp.setRequestHeader("Content-Type", "text/xml");				
			Console.WriteLine(sQuery.Length);
			oXMLHttp.send(sQuery);

			Console.WriteLine(oXMLHttp.status);
			Console.WriteLine(oXMLHttp.statusText);
			Console.WriteLine(oXMLHttp.responseText);
			}
			catch (Exception e)
			{
				Console.WriteLine("{0} Exception caught.", e);
			}

		}
         }
}