A JsonConverter for serializing Exceptions using System.Text.Json.JsonSerializer

ExceptionConverter.cs

public class ExceptionConverter<TExceptionType> : JsonConverter<TExceptionType> where TExceptionType : Exception
{
    public override bool CanConvert(Type typeToConvert) => typeof(Exception).IsAssignableFrom(typeToConvert);

    public override TExceptionType Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) 
        => throw new NotSupportedException("Deserializing exceptions is not allowed");

    public override void Write(Utf8JsonWriter writer, TExceptionType value, JsonSerializerOptions options)
    {
        var serializableProperties = value.GetType()
            .GetProperties()
            .Select(uu => new { uu.Name, Value = uu.GetValue(value) })
            .Where(uu => uu.Name != nameof(Exception.TargetSite));

        if (options?.DefaultIgnoreCondition == JsonIgnoreCondition.WhenWritingNull)
        {
            serializableProperties = serializableProperties.Where(uu => uu.Value != null);
        }

        var propList = serializableProperties.ToList();

        if (propList.Count == 0)
        {
            // Nothing to write
            return;
        }

        writer.WriteStartObject();

        foreach (var prop in propList)
        {
            writer.WritePropertyName(prop.Name);
            JsonSerializer.Serialize(writer, prop.Value, options);
        }

        writer.WriteEndObject();
    }
}