private static void Update(ComputerIPsItem item)
        {
            try
            {
                var computerIp = CurrentContextDb.ComputerIps.FirstOrDefault(x => x.Id == item.Id);

                if (computerIp != null)
                {
                    computerIp.Computer = item.Computer;
                    computerIp.Ip       = item.Ip;
                    computerIp.Source   = item.Source;
                }
            }
            catch (InvalidOperationException ex)
            {
                throw new InvalidOperationException(ex.Message);
            }
        }
 private static void AddNew(ComputerIPsItem item)
 {
     item.IdProject = Program.data.Project.Id;
     CurrentContextDb.ComputerIps.Add(item);
 }