public bool IsRotatedString(string s1, string s2)
        {
            int length = s1.Length;

            if (length == s2.Length && length > 0)
            {
                StringSearcher searcher = new StringSearcher();
                string         s1s1     = s1 + s1;
                return(searcher.CountSubstringInstances(s2, s1s1) > 0);
            }

            return(false);
        }
        public bool IsRotatedString(string s1, string s2)
        {
            if (s1.Length != s2.Length)
            {
                return(false);
            }

            int index = 0;

            for (int i = 0; i < s2.Length; i++)
            {
                if (i == 0)
                {
                    for (int j = 0; j < s1.Length; j++)
                    {
                        if (s1[j] == s2[i])
                        {
                            index = j;
                            break;
                        }
                    }
                    return(false);
                }

                if (s1[index] != s2[i])
                {
                    if (s1[0] == s2[i])
                    {
                        StringSearcher searcher = new StringSearcher();
                        string         sub      = BuildTailingSubstring(s2, i);
                        return(searcher.CountSubstringInstances(s2, sub) > 0);
                    }
                    return(false);
                }

                index++;

                if (index > s1.Length)
                {
                    return(false);
                }
            }

            return(false);
        }