BoxKite.Twitter.UsersExtensions.GetProfileBanners C# (CSharp) Метод

        public static async Task<ProfileBanners> GetProfileBanners(this IUserSession session, string screenName = "", long userId = 0)
        {
            var parameters = new TwitterParametersCollection();
            parameters.Create(include_entities:true,skip_status:true,screen_name:screenName,user_id:userId);

            if (parameters.EnsureEitherOr("screen_name", "user_id").IsFalse())
            {
                return session.MapParameterError<ProfileBanners>(
                        "Either screen_name or user_id required");
            } 
            return await session.GetAsync(TwitterApi.Resolve("/1.1/users/profile_banner.json"), parameters)
                         .ContinueWith(c => c.MapToSingle<ProfileBanners>());
        }