LeetCode - RemoveDuplicates

    public class Solution
    {
        public string RemoveDuplicates(string S)
        {
            var result = new Stack<char>();
            foreach(var s in S)
            {
                if (result.Any())
                {
                    if (result.First() == s)
                    {
                        result.Pop();
                    }
                    else
                    {
                        result.Push(s);
                    }
                }
                else
                {
                    result.Push(s);
                }

            }
            return string.Join(string.Empty, result.ToArray().Reverse());
        }
    }