Automate adding #Twitter User Not Flowing Back to a List and unfollow them with C# and Tweetinvi

gistfile1.txt

Auth.SetUserCredentials("CONSUMER_KEY", "CONSUMER_SECRET", "ACCESS_TOKEN", "ACCESS_TOKEN_SECRET");
var user = Tweetinvi.User.GetUserFromScreenName("osman_elrashid");
RateLimit.RateLimitTrackerMode = RateLimitTrackerMode.TrackAndAwait;
var lists = user.GetOwnedLists(Int32.MaxValue);
var followerIds = user.GetFollowerIds(Int32.MaxValue);
var friendIds = user.GetFriendIds(Int32.MaxValue);

var followersCount = followerIds.Count();
var friendsCount = friendIds.Count();
var followersFlowingBack = followerIds.Where(x => friendIds.Contains(x) ).Count();
var followersNotFlowingBack = followerIds.Where(x => !friendIds.Contains(x) ).Count();
var friendsFlowingBack = friendIds.Where(x => followerIds.Contains(x)).Count();
var friendsNotFlowingBack = friendIds.Where(x => !followerIds.Contains(x)).Count();

var friendsNotFlowingBack = friendIds.Where(x => !followerIds.Contains(x));

var list = TwitterList.CreateList("Thanks", Tweetinvi.Models.PrivacyMode.Public , "Thanks");

foreach (var friendNotFlowingBack in friendsNotFlowingBack)
{
    list.AddMember(friendNotFlowingBack);
}
foreach (var friendNotFlowingBack in friendsNotFlowingBack)
{
    Friendship.FriendshipController.DestroyFriendshipWith(friendNotFlowingBack);

}