Using Web Services for Remoting over the Internet.

using System;
using System.Diagnostics;
using System.Threading;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Messaging;
using System.Runtime.Remoting.Contexts; 


namespace MyRemoteObject
{
	[Serializable]
	public class User : ILogicalThreadAffinative 
	{
		private string FirstName;
		private string LastName;
		public string lastname{ get{ return LastName; } set{LastName = value;}} 
		public string firstname{ get{ return FirstName; } set{FirstName = value;}} 
	}

	public class RemoteObject : MarshalByRefObject
	{
		private string	_name = "Mike";
		private int		_id = 0;
		public string Name { get{ return _name; } set{ _name = value; }}
		public int Id { get{ return _id; } set{ _id = value; }}

		public RemoteObject()
		{
			Trace.WriteLine("RemoteObject ctor");
		}
		public object SayHello(string reqmsg, out string rspmsg, int i, out object str)
		{
			User user = null;

			try 
			{
				user = (User)CallContext.GetData("User");
				if(user == null) 
				{
					user = new User();
					user.firstname = "Admin";
					user.lastname = "";
				}
					
				if(reqmsg == "throw")
					throw new Exception(string.Format("Hi {0}, this is an Exception test", user.firstname));
			
				rspmsg = string.Format("[#{0}] Hello {1}. You've typed '{2}'.", i, user.firstname, reqmsg);
				str = string.Format("State: {0}, {1}", _name, _id++);

				user.firstname = user.firstname.ToUpper();

				Trace.WriteLine(string.Format("RemObject.SayHello({0}, user is {1} {2})", reqmsg, user.firstname, user.lastname));
			}
			catch(Exception ex)
			{
				Trace.WriteLine(string.Format("RemoteObject.SayHello cautch: {0}",ex.Message));
				throw ex;
			}
			
			return "Done";
		}
		[OneWay]
		public void OneWay(string msg, int ms)
		{
			Thread.Sleep(ms);
			Console.WriteLine("RemoteObject.OneWay({0})", msg);
		}
	}
}