public ActionResult PostTransacao([FromBody] Transacao transacao) { Transacao T = new Transacao(); int t1 = 0; int t2 = 0; t1 = T.ValorPagar; t2 = T.ValorPago; T.calculatroco(t1, t2); if (!ModelState.IsValid) { return(BadRequest(ModelState)); } _context.Resultado.Add(transacao); _context.SaveChanges(); return(CreatedAtAction("GetTransacao", transacao)); }