DiscordChatExporter/DiscordChatExporter.Core.Services/Extensions.cs

using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;

namespace DiscordChatExporter.Core.Services
{
    public static class Extensions
    {
        private static async ValueTask<IReadOnlyList<T>> AggregateAsync<T>(this IAsyncEnumerable<T> asyncEnumerable)
        {
            var list = new List<T>();

            await foreach (var i in asyncEnumerable)
                list.Add(i);

            return list;
        }

        public static ValueTaskAwaiter<IReadOnlyList<T>> GetAwaiter<T>(this IAsyncEnumerable<T> asyncEnumerable) =>
            asyncEnumerable.AggregateAsync().GetAwaiter();
    }
}