using System;

using System.Collections.Generic;

using System.Text.Json;                 

using System.Text.Json.Serialization;               

​

public class Program

{

    private const string JsonString = @"

            {

                ""item"": [

                  {

                    ""serialNo"": ""000000000002200878"",

                    ""affiliationOrgCode"": ""OrgCode1""

                  },

                  {

                    ""serialNo"": ""000000000002201675"",

                    ""affiliationOrgCode"": ""OrgCode1""

                  }

                ]

            }

        ";  

    public static void Main()

    {

        var options = new JsonSerializerOptions(JsonSerializerDefaults.Web);

        options.Converters.Add(new SerialNoConverter());

        var deserializedClass = JsonSerializer.Deserialize<Root>(JsonString, options);

​

        deserializedClass.Dump();

    }

}

​

public class SerialNoConverter : JsonConverter<SerialNo>

{

    public override SerialNo? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)

    {

        var serialNo = reader.GetString();

        return new SerialNo(serialNo);

    }

​

    public override void Write(Utf8JsonWriter writer, SerialNo value, JsonSerializerOptions options)

    {

        throw new NotImplementedException();

    }

}

​

public class SerialNo

{

    [JsonConstructor]

    public SerialNo(string serialNo)

    {

        if (serialNo == null) throw new ArgumentNullException(nameof(serialNo));

​

        if (string.IsNullOrWhiteSpace(serialNo)) throw new Exception("My exception text");

​

        Value = serialNo.Trim('0');

    }

​

    [JsonPropertyName("serialNo")]

    public string Value { get; set; }

}

​

public class Item

{

    public SerialNo SerialNo { get; set; }

​

    public string AffiliationOrgCode { get; set; }

}

​

public class Root

{

    public List<Item> Item { get; set; }

}

​

​

​

​

​