public async Task <ActionResult <counterpart> > Postcounterpart(counterpart counterpart)
        {
            _context.counterparts.Add(counterpart);
            await _context.SaveChangesAsync();

            return(CreatedAtAction("Getcounterpart", new { id = counterpart.id }, counterpart));
        }
        public async Task <IActionResult> Putcounterpart(int id, counterpart counterpart)
        {
            if (id != counterpart.id)
            {
                return(BadRequest());
            }

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

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

            return(NoContent());
        }