public void OpretOrdre()
        {
            KundeCollection.Add(new Kunde(KundeCVRnummer, Navn, Firma, Adresse, By, Postnr, Mail, Telefonnr));
            OrdrerCollection.Add(new Ordre(Date, Laminering, Fragt, OpTil10, Montering, Afhentes, KundeCVRnummer, ProduktCollection));
            OnPropertyChanged();
            SaveOrdrer();
            SaveKunder();
            frame.Navigate(typeof(Forside));

            //var SorteretEfterDato = (from ordre in OrdrerCollection orderby ordre.Date descending select ordre);
            //OrdrerCollection.Clear();
            //foreach (var ordre in SorteretEfterDato)
            //{
            //    OrdrerCollection.Add(ordre);
            //}
        }
        public async void Load()
        {
            string curFile = @"C:\Users\rasmu\AppData\Local\Packages\347085fc-770a-47bf-87e0-14e3e41dd8a6_2g8htre5d9nf2\LocalState\Ordrer.json";

            if (File.Exists(curFile))
            {
                var ordrerCollection = await GemAktiveredeOrdre.LoadOrdreFromJsonAsync();

                OrdrerCollection.Clear();
                foreach (var ordre in ordrerCollection)
                {
                    OrdrerCollection.Add(ordre);
                }
            }
            string curFile2 = @"C:\Users\rasmu\AppData\Local\Packages\347085fc-770a-47bf-87e0-14e3e41dd8a6_2g8htre5d9nf2\LocalState\DeaktiveredeOrdrer.json";

            if (File.Exists(curFile2))
            {
                var deaktiveredeOrdrerCollection = await GemDeaktiveredeOrdrer.LoadOrdreFromJsonAsync();

                DeaktiveredeOrdrerCollection.Clear();
                foreach (var ordre in deaktiveredeOrdrerCollection)
                {
                    DeaktiveredeOrdrerCollection.Add(ordre);
                }
            }
            string curFile3 = @"C:\Users\rasmu\AppData\Local\Packages\347085fc-770a-47bf-87e0-14e3e41dd8a6_2g8htre5d9nf2\LocalState\Kunder.json";

            if (File.Exists(curFile3))
            {
                var kundeCollection = await GemKunde.LoadKunderFromJsonAsync();

                KundeCollection.Clear();
                foreach (var kunde in kundeCollection)
                {
                    KundeCollection.Add(kunde);
                }
            }
        }
 public void OpretKunde()
 {
     KundeCollection.Add(new Kunde(KundeCVRnummer, Navn, Firma, Adresse, By, Postnr, Mail, Telefonnr));
     OnPropertyChanged();
     SaveKunder();
 }