public async Task <IActionResult> PutTcrossing(short id, Tcrossing tcrossing)
        {
            if (id != tcrossing.TcrossingId)
            {
                return(BadRequest());
            }

            _context.Entry(tcrossing).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!TcrossingExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(NoContent());
        }
        public async Task <ActionResult <Tcrossing> > PostTcrossing(Tcrossing tcrossing)
        {
            _context.Tcrossing.Add(tcrossing);
            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateException)
            {
                if (TcrossingExists(tcrossing.TcrossingId))
                {
                    return(Conflict());
                }
                else
                {
                    throw;
                }
            }

            return(CreatedAtAction("GetTcrossing", new { id = tcrossing.TcrossingId }, tcrossing));
        }