TaikoLocalServer/LocalSaveModScoreMigrator/DateTimeConverter.cs

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

namespace LocalSaveModScoreMigrator;

public class DateTimeConverter : JsonConverter<DateTime>
{
    public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        Debug.Assert(typeToConvert == typeof(DateTime));
        var dateTime = DateTime.ParseExact(reader.GetString() ?? string.Empty, "dd_MM_yy-HH_mm_ss",
            CultureInfo.InvariantCulture);
        return dateTime;
    }

    public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
    {
        writer.WriteStringValue(value.ToString(CultureInfo.InvariantCulture));
    }
}