/// <summary>
        /// Gets a list of IDs representing the friends of a given user.
        /// </summary>
        /// <param name="screenName">The screen name of the user.</param>
        /// <param name="options">The options for the call.</param>
        public string GetIdsFromScreenName(string screenName, TwitterFriendsIdsOptions options)
        {
            // Define the query string
            NameValueCollection query = new NameValueCollection {
                { "screenName", screenName }
            };

            // Update the query string with the specified options
            if (options != null)
            {
                options.UpdateNameValueCollection(query);
            }

            // Make the call to the API
            return(Client.DoHttpRequestAsString("GET", "https://api.twitter.com/1.1/friends/ids.json", query));
        }
        /// <summary>
        /// Gets a list of IDs representing the friends of a given user.
        /// </summary>
        /// <param name="userId">The ID of the user.</param>
        /// <param name="options">The options for the call.</param>
        public string GetIdsFromUserId(long userId, TwitterFriendsIdsOptions options)
        {
            // Define the query string
            NameValueCollection query = new NameValueCollection {
                { "user_id", userId.ToString(CultureInfo.InvariantCulture) }
            };

            // Update the query string with the specified options
            if (options != null)
            {
                options.UpdateNameValueCollection(query);
            }

            // Make the call to the API
            return(Client.DoHttpRequestAsString("GET", "https://api.twitter.com/1.1/friends/ids.json", query));
        }