Code:

....       channel = new TcpServerChannel(1344);
            ChannelServices.RegisterChannel(channel);
            RemotingConfiguration.RegisterWellKnownServiceType(typeof(ConnLoader), "ConnLoader", WellKnownObjectMode.SingleCall);

Code:

....       ChannelServices.RegisterChannel(new TcpChannel());
            loader = (ConnLoader)Activator.GetObject(typeof(ConnLoader), "tcp://localhost:1344/ConnLoader");
....
             string myConnectionString = "Data Source = localhost:1344;Initial Catalog = Magacin;User ID = " + Username + ";Password = " + Password;
            
            try{
                 SqlConnection conn = new SqlConnection(myConnectionString);
                 conn.Open();

                if (conn != null)
                {
                    return true;
                }
                else
                {
                    return false;
                }
                }
                catch(Exception e)
                {
                    Console.WriteLine("Connection failed " + "\n" + "Reason :" + e.Message);
                    return false;