public class Solution {
    public bool CanPermutePalindrome(string s) {
        //char[] schar = s.ToCharArray();
        var schar = s.ToList().GroupBy(i=>i);//Attention Plz!!!
        int sum = 0;
        foreach (var item in schar)
        {
            if (item.Count()==1 || item.Count()%2==1)
            {
                sum++;
            }
         }
         return  sum<=1;
    }
}