public async Task <ActionResult <dotation> > Postdotation(dotation dotation)
        {
            _context.dotations.Add(dotation);
            await _context.SaveChangesAsync();

            return(CreatedAtAction("Getdotation", new { id = dotation.Id }, dotation));
        }
        public async Task <IActionResult> Putdotation(int id, dotation dotation)
        {
            if (id != dotation.Id)
            {
                return(BadRequest());
            }

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

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

            return(NoContent());
        }