private Negotiator AddNewCat() { var log = new LoggerConfiguration() .WriteTo.Console() .CreateLogger(); var log2 = new LoggerConfiguration() .WriteTo.File(@".\log.log") .CreateLogger(); log.Information("Start"); log2.Information("Start"); var cat = this.Bind <Cat>(); if (null == cat || string.IsNullOrEmpty(cat.Name)) { return(Negotiate.WithStatusCode(HttpStatusCode.NotAcceptable)); } if (Data.Cats.Select(cat1 => cat1.Name.ToUpper()).Contains(cat.Name.ToUpper())) { return(Negotiate.WithStatusCode(HttpStatusCode.NotAcceptable)); } log.Information("Cat: {@cat}", cat); log2.Information("Cat: {@cat}", cat); Data.Cats.Add(cat); // the fix // return HttpStatusCode.Created; return(Negotiate .WithFullNegotiation() .WithModel(Data.Cats) .WithStatusCode(HttpStatusCode.Created) .WithView("allcats.html")); }