telegram-bot/Core/Extensions/HttpClientExtension.cs

using System;
using System.Net.Http;
using System.Threading.Tasks;
using Newtonsoft.Json;

namespace Kruzya.TelegramBot.Core.Extensions
{
    public static class HttpClientExtension
    {
        public static async Task<T> GetJsonAsync<T>(this HttpClient client, Uri requestUri)
        {
            var response = await client.GetStringAsync(requestUri);
            return JsonConvert.DeserializeObject<T>(response);
        }

        public static async Task<T> GetJsonAsync<T>(this HttpClient client, string requestUri)
        {
            var response = await client.GetStringAsync(requestUri);
            return JsonConvert.DeserializeObject<T>(response);
        }
    }
}