public static string IgnoreTweetsBy(string screenName) { var friendIds = _user.GetFriendIds(); foreach (var id in friendIds) { if (User.GetUserFromId(id).ScreenName.Equals(screenName)) { _ignoreTweetsBy.AddOrUpdateKey(screenName, screenName, UpdateIgnoreTweetsFile); return($"{screenName} will now be ignored when they post"); } } return($"{screenName} was not found or not being followed"); }