using System;

namespace RemotingType
{
	/// <summary>
	/// Summary description for Class1.
	/// </summary>
	/// 
	public class Class2:MarshalByRefObject
	{
		public int a=1;
		public Class2()
		{
		}
	}
	public class Class1:MarshalByRefObject
	{
		public Class1()
		{
			//
			// TODO: Add constructor logic here
			//
		}
		public Class2 getClass2()
		{
			
			return new Class2();
		}
		public void AddSumm( Class2 asdf)
		{
			//asdf.a+=123;
			asdf=new Class2();
		}
	}
}

using System;
using System.Runtime.Remoting;
namespace Listener
{
	public class Start
	{
		[STAThread]
		static void Main() 
		{
			RemotingConfiguration.Configure("Listener.exe.config");
			Console.WriteLine("Press ENTER to end remoting");
			Console.ReadLine();
		}
	}
}

using System;
using RemotingType;
using System.Runtime.Remoting;
namespace RemotingClient
{
	/// <summary>
	/// Summary description for Class1.
	/// </summary>
	class Class1
	{
		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main(string[] args)
		{
			RemotingConfiguration.Configure("RemotingClient.exe.config");

			RemotingType.Class1 cls=new RemotingType.Class1();

			Class2 cl2,cl3;
			cl3=cls.getClass2();
			cls.AddSumm(cl3);
			//
			// TODO: Add code to start application here
			//
		}
	}
}

<configuration>
   <system.runtime.remoting>
      <application>
         <client>
            <wellknown 
               type="RemotingType.Class1, RemotingType"
               url="http://localhost:8989/RemotingType.rem"
            />
         </client>
      </application>
   </system.runtime.remoting>
</configuration>

<configuration>
   <system.runtime.remoting>
      <application>
         <service>
            <wellknown 
               mode="Singleton" 
               type="RemotingType.Class1, RemotingType" 
               objectUri="RemotingType.rem"
            />
         </service>
         <channels>
            <channel ref="http" port="8989"/>
         </channels>
      </application>
   </system.runtime.remoting>
</configuration>