CryptoExchange.Net/CryptoExchange.Net/Converters/SystemTextJson/DecimalStringWriterConverter.cs

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

namespace CryptoExchange.Net.Converters.SystemTextJson
{
    /// <summary>
    /// Converter for serializing decimal values as string
    /// </summary>
    public class DecimalStringWriterConverter : JsonConverter<decimal>
    {
        /// <inheritdoc />
        public override decimal Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            throw new NotImplementedException();
        }

        /// <inheritdoc />
        public override void Write(Utf8JsonWriter writer, decimal value, JsonSerializerOptions options)
            => writer.WriteStringValue(value.ToString(CultureInfo.InvariantCulture) ?? null);
    }
}