Cannot convert null literal to non-nullable reference type.

Non-nullable property 'VCode' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Id' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Type' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'JsonLdMetadata' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'GestructureerdeIdentificator' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'CodeerSysteem' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'JsonLdMetadataType' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'JsonLdMetadata' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'JsonLdMetadata' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'BucketName' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

'JsonNetSerializer.Customize(Action<JsonSerializer>)' is obsolete: 'Use Configure(Action<JsonSerializerSettings> configure) instead. This overload will be removed in the next major release.'

Possible null reference argument for parameter 'Beschrijving' in 'ContactgegevensRecord.ContactgegevensRecord(string Beschrijving, string Bron, int ContactgegevenId, string ContactgegevenType, bool IsPrimair, string VCode, string Waarde)'.

Possible null reference argument for parameter 'AdresIdBroncode' in 'LocatiesRecord.LocatiesRecord(string AdresIdBroncode, string AdresIdBronwaarde, string Adresvoorstelling, string Bron, string Busnummer, string Gemeente, string Huisnummer, bool IsPrimair, string Land, int LocatieId, string LocatieType, string Naam, string PostCode, string Straatnaam, string VCode)'.

Possible null reference argument for parameter 'AdresIdBronwaarde' in 'LocatiesRecord.LocatiesRecord(string AdresIdBroncode, string AdresIdBronwaarde, string Adresvoorstelling, string Bron, string Busnummer, string Gemeente, string Huisnummer, bool IsPrimair, string Land, int LocatieId, string LocatieType, string Naam, string PostCode, string Straatnaam, string VCode)'.

Possible null reference argument for parameter 'Busnummer' in 'LocatiesRecord.LocatiesRecord(string AdresIdBroncode, string AdresIdBronwaarde, string Adresvoorstelling, string Bron, string Busnummer, string Gemeente, string Huisnummer, bool IsPrimair, string Land, int LocatieId, string LocatieType, string Naam, string PostCode, string Straatnaam, string VCode)'.

Possible null reference argument for parameter 'Gemeente' in 'LocatiesRecord.LocatiesRecord(string AdresIdBroncode, string AdresIdBronwaarde, string Adresvoorstelling, string Bron, string Busnummer, string Gemeente, string Huisnummer, bool IsPrimair, string Land, int LocatieId, string LocatieType, string Naam, string PostCode, string Straatnaam, string VCode)'.

Possible null reference argument for parameter 'Huisnummer' in 'LocatiesRecord.LocatiesRecord(string AdresIdBroncode, string AdresIdBronwaarde, string Adresvoorstelling, string Bron, string Busnummer, string Gemeente, string Huisnummer, bool IsPrimair, string Land, int LocatieId, string LocatieType, string Naam, string PostCode, string Straatnaam, string VCode)'.

Possible null reference argument for parameter 'Land' in 'LocatiesRecord.LocatiesRecord(string AdresIdBroncode, string AdresIdBronwaarde, string Adresvoorstelling, string Bron, string Busnummer, string Gemeente, string Huisnummer, bool IsPrimair, string Land, int LocatieId, string LocatieType, string Naam, string PostCode, string Straatnaam, string VCode)'.

Possible null reference argument for parameter 'Naam' in 'LocatiesRecord.LocatiesRecord(string AdresIdBroncode, string AdresIdBronwaarde, string Adresvoorstelling, string Bron, string Busnummer, string Gemeente, string Huisnummer, bool IsPrimair, string Land, int LocatieId, string LocatieType, string Naam, string PostCode, string Straatnaam, string VCode)'.

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Nullability of reference types in return type of 'Task<PostalInformationResponse?> GrarClient.GetPostalInformation(string postcode)' doesn't match implicitly implemented member 'Task<PostalInformationResponse> IGrarClient.GetPostalInformation(string postcode)'.

'Contactgegevens.Empty' hides inherited member 'ReadOnlyCollection<Contactgegeven>.Empty'. Use the new keyword if hiding was intended.

'Datum' defines 'Equals' but not 'GetHashCode'

'HoofdactiviteitenVerenigingsloket.Empty' hides inherited member 'ReadOnlyCollection<HoofdactiviteitVerenigingsloket>.Empty'. Use the new keyword if hiding was intended.

'Locaties.Empty' hides inherited member 'ReadOnlyCollection<Locatie>.Empty'. Use the new keyword if hiding was intended.

'Vertegenwoordigers.Empty' hides inherited member 'ReadOnlyCollection<Vertegenwoordiger>.Empty'. Use the new keyword if hiding was intended.

Dereference of a possibly null reference.

Possible null reference argument for parameter 'locatie' in 'Task<IEvent> VerenigingOfAnyKind.GetAdresMatchEvent(int locatieId, Locatie locatie, IGrarClient grarClient, CancellationToken cancellationToken)'.

Possible null reference argument for parameter 'locatieVoorTeMatchenAdres' in 'IEvent VerenigingOfAnyKind.GetAdresMatchExceptionEvent(int locatieId, AdressenregisterReturnedNonSuccessStatusCode ex, Locatie locatieVoorTeMatchenAdres)'.