C#

<pre>// <auto-generated />
//
// To parse this JSON data, add NuGet 'Newtonsoft.Json' then do:
//
//    using quicktype;
//
//    var welcome = Welcome.FromJson(jsonString);

namespace quicktype
{
    using System;
    using System.Collections.Generic;

    using System.Globalization;
    using Newtonsoft.Json;
    using Newtonsoft.Json.Converters;

    public partial class Welcome
    {
        [JsonProperty("PropertyInfos")]
        public List<PropertyInfo> PropertyInfos { get; set; }
    }

    public partial class PropertyInfo
    {
        [JsonProperty("Identification")]
        public Identification Identification { get; set; }

        [JsonProperty("PropertyName")]
        public string PropertyName { get; set; }

        [JsonProperty("ManagementCompany")]
        public ManagementCompany ManagementCompany { get; set; }

        [JsonProperty("Address")]
        public Address Address { get; set; }
    }

    public partial class Address
    {
        [JsonProperty("Address")]
        public string AddressAddress { get; set; }

        [JsonProperty("City")]
        public string City { get; set; }

        [JsonProperty("State")]
        public string State { get; set; }

        [JsonProperty("PostalCode")]
        [JsonConverter(typeof(ParseStringConverter))]
        public long PostalCode { get; set; }

        [JsonProperty("Email")]
        public string Email { get; set; }
    }

    public partial class Identification
    {
        [JsonProperty("IDValue")]
        [JsonConverter(typeof(ParseStringConverter))]
        public long IdValue { get; set; }
    }

    public partial class ManagementCompany
    {
        [JsonProperty("ManagementCompanyName")]
        public string ManagementCompanyName { get; set; }

        [JsonProperty("Identification")]
        public Identification Identification { get; set; }
    }

    public partial class Welcome
    {
        public static Welcome FromJson(string json) => JsonConvert.DeserializeObject<Welcome>(json, quicktype.Converter.Settings);
    }

    public static class Serialize
    {
        public static string ToJson(this Welcome self) => JsonConvert.SerializeObject(self, quicktype.Converter.Settings);
    }

    internal static class Converter
    {
        public static readonly JsonSerializerSettings Settings = new JsonSerializerSettings
        {
            MetadataPropertyHandling = MetadataPropertyHandling.Ignore,
            DateParseHandling = DateParseHandling.None,
            Converters =
            {
                new IsoDateTimeConverter { DateTimeStyles = DateTimeStyles.AssumeUniversal }
            },
        };
    }

    internal class ParseStringConverter : JsonConverter
    {
        public override bool CanConvert(Type t) => t == typeof(long) || t == typeof(long?);

        public override object ReadJson(JsonReader reader, Type t, object existingValue, JsonSerializer serializer)
        {
            if (reader.TokenType == JsonToken.Null) return null;
            var value = serializer.Deserialize<string>(reader);
            long l;
            if (Int64.TryParse(value, out l))
            {
                return l;
            }
            throw new Exception("Cannot unmarshal type long");
        }

        public override void WriteJson(JsonWriter writer, object untypedValue, JsonSerializer serializer)
        {
            if (untypedValue == null)
            {
                serializer.Serialize(writer, null);
                return;
            }
            var value = (long)untypedValue;
            serializer.Serialize(writer, value.ToString());
            return;
        }

        public static readonly ParseStringConverter Singleton = new ParseStringConverter();
    }
}

ICARUS999 wrote:

There is a requirement to send and receive data over TCP/IP with a Fiscal (tax) device which acts as a gateway to the Tax authority server.