Get request in ASP.NET core

cs

 WebRequest request = WebRequest.Create("https://api.thecatapi.com/v1/categories");
            using (var s = request.GetResponse().GetResponseStream())
            {
                using (var sr = new StreamReader(s))
                {
                    var asJSON = sr.ReadToEnd();
                    res = JsonConvert.DeserializeObject<List<CategoriesModel>>(asJSON);
                }
            }