Как пофиксить 'Unable to resolve service for type 'System.Net.Http.HttpClient' while attempting to activate ''?

Question

[Ness]

Получаю ошибку при вызове метода Post:

System.InvalidOperationException: 'Unable to resolve service for type 'System.Net.Http.HttpClient' while attempting to activate 'TgBotCore.Services.Post'.'

internal sealed class Post
    {
        private readonly HttpClient _client;
        private readonly ITelegramBotClient _bot;
        private readonly VkApi _api;
        private readonly Vk _parser;
        const string channelId = "@linkd_1";

        public Post(ITelegramBotClient bot, HttpClient client, VkApi api, Vk parser)
        {
            _client = client;
            _bot = bot;
            _api = api;
            _parser = parser;
        }

        public async Task SendPost(HttpClient client, ITelegramBotClient bot, VkApi api, Vk parser)
        {..}

services.AddHttpClient<Post>();
services.AddSingleton<Post>();

Что может быть не так?

Answer 1

[Ness]

Решил так:

services.TryAddTransient(s =>
 {
return s.GetRequiredService<IHttpClientFactory>().CreateClient(string.Empty);
});