CryptoExchange.Net/CryptoExchange.Net/Converters/SystemTextJson/NumberStringConverter.cs

using System;
using System.Globalization;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace CryptoExchange.Net.Converters.SystemTextJson
{
    /// <summary>
    /// Read string or number as string
    /// </summary>
    public class NumberStringConverter : JsonConverter<string?>
    {
        /// <inheritdoc />
        public override string? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            if (reader.TokenType == JsonTokenType.Null)
                return null;

            if (reader.TokenType == JsonTokenType.Number)
                return reader.GetInt64().ToString();

            return reader.GetString();
        }

        /// <inheritdoc />
        public override void Write(Utf8JsonWriter writer, string? value, JsonSerializerOptions options)
        {
            writer.WriteStringValue(value);
        }
    }
}