[Serializable()]
      public class Logon
      {

         public string user { get; set; }
         public TimeSpan time { get; set; }
         public DateTime date { get; set; }
         public string IPAdress { get; set; }
         public string ComputerName { get; set; }
         public string Login { get; set; }
        public RecordSerializable()
               : this( 0, string.Empty, string.Empty, 0M )
         public RecordSerializable( string IPAdress, string ComputerName, string user, string Login )
         {
            IPAdress = "IPADRESS" + GetLocalIPAdress();
            ComputerName = System.Environment.MachineName;
            FormLock testBox = new FormLock();
            user = testBox.textBox1.Text;
            Login = "False";
         }
         public static string GetLocalIPAdress()
         {
            var host = Dns.GetHostEntry(Dns.GetHostName());
            foreach (var ip in host.AddressList)
            {
               if (ip.AddressFamily == AddressFamily.InterNetwork)
               {
                  return ip.ToString();
               }
            }
            throw new Exception("Local IP Address Not Found!");


         }
         private BinaryFormatter formatter = new BinaryFormatter();


            private FileStream output; // stream for writing to a file

         private void serializeThis()
         {


            List<Logon> values = new List<Logon>();
            string fileName = "loginfo.dat";
            try
            {
               output = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Write);
            }
            catch (IOException)
            {
               MessageBox.Show("Error opening file", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            RecordSerializable record = new RecordSerializable();
         }


      }