JsonConverter for list of enum string

ListOfEnumStringConverter.cs

using System.Reflection;

namespace System.Text.Json.Serialization;

/// https://learn.microsoft.com/dotnet/standard/serialization/system-text-json/converters-how-to
public class ListOfEnumStringConverter : JsonConverterFactory
{
    public override bool CanConvert(Type typeToConvert)
    {
        if (!typeToConvert.IsGenericType)
        {
            return false;
        }

        return typeToConvert.GetGenericTypeDefinition() == typeof(IList<>) && typeToConvert.GetGenericArguments()[0].IsEnum;
    }

    public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
    {
        Type enumType = typeToConvert.GetGenericArguments()[0];

        JsonConverter converter = (JsonConverter)Activator.CreateInstance(
            typeof(ListOfEnumStringConverterInner<>).MakeGenericType(enumType),
            BindingFlags.Instance | BindingFlags.Public,
            binder: null,
            args: null,
            culture: null)!;

        return converter;
    }

    private sealed class ListOfEnumStringConverterInner<T> :
        JsonConverter<List<T>> where T : struct, Enum
    {
        public override List<T> Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            if (reader.TokenType != JsonTokenType.StartArray)
            {
                throw new JsonException();
            }

            var items = new List<T>();

            while (reader.Read())
            {
                if (reader.TokenType == JsonTokenType.EndArray)
                {
                    return items;
                }

                // Get the item.
                string? value = reader.GetString();
                
                // For performance, parse with ignoreCase:false first.
                if (!Enum.TryParse(value, ignoreCase: false, out T item) &&
                    !Enum.TryParse(value, ignoreCase: true, out item))
                {
                    throw new JsonException(
                        $"Unable to convert \"{value}\" to Enum \"{typeof(T)}\".");
                }

                items.Add(item);
            }
            throw new JsonException();
        }

        public override void Write(Utf8JsonWriter writer, List<T> items, JsonSerializerOptions options)
        {
            writer.WriteStartArray();

            foreach (var item in items)
            {
                writer.WriteStringValue(item.ToString());
            }

            writer.WriteEndArray();
        }
    }
}