marechai/Marechai.Server/Helpers/IsoDateTimeConverter.cs

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

namespace Marechai.Server.Helpers;

public sealed class IsoDateTimeConverter : JsonConverter<DateTime>
{
    public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) =>
        DateTime.Parse(reader.GetString());

    public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
    {
        writer.WriteStringValue(value.ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ss.fffZ"));
    }
}