Attribute Metadata Silliness

Silly.cs

public async static void AddDocuments<T>(IList<T> things) where T : class, new()
{
    var indexClient = new SearchIndexClient(ConfigurationManager.AppSettings["SearchServiceName"], things.First().GetType().Name.ToLower(), new SearchCredentials(ConfigurationManager.AppSettings["SearchServiceApiKey"]));
    
    try
    {
        Trace.WriteLine($"Adding {things.Count()} documents to the index...");
        var thingsToIndex = things.Where(x => x.GetType().GetProperties().Any(prop => prop.GetCustomAttribute<IndexMetadataAttribute>() != null));
        var newThings = thingsToIndex.Select(x =>
        {
            var props = x.GetType().GetProperties().Where(y => y.GetCustomAttribute<IndexMetadataAttribute>() != null);
            var newThing = new ExpandoObject() as IDictionary<string, object>;
    
            foreach (var p in props)
            {
                var propertyValue = p.GetValue(x);
                if (p.GetCustomAttribute<IndexMetadataAttribute>().IsKey)
                {
                    propertyValue = (propertyValue as string).Base64UrlEncode();
                }
                newThing[p.Name] = propertyValue;
            }
            return newThing;
        });
        await indexClient.Documents.IndexAsync(IndexBatch.Create(newThings.Select(IndexAction.Create)));
        Trace.WriteLine("finished adding documents to index");
    }
    catch (IndexBatchException e)
    {
        Trace.WriteLine("Failed to index some of the documents: {0}", String.Join(", ", e.IndexResponse.Results.Where(r => !r.Succeeded).Select(r => r.Key)));
    }
}