Given a string ,find if its permutation can be a palindrome

    
public class Solution {
public bool CanPermutationPalindrome(string s) {
var ht=new Hashtable();
for(int i=0;i<s.Length;i++){
        if(ht.Contains(s[i])){
           ht[s[i]]=(int)ht[s[i]]+ 1;
        }
        else{
            ht.Add(s[i],1);
        }
    }

    if(ht.Keys.Count==1){
        return true;
    }


    var count=0;
    var oddCount=0;

    foreach (var val in ht.Values)
    {
        var value=(int)val;
        if(value==1){
            count++;
        }

        if(value%2==1 && value !=1){
            oddCount++;
        }

    }

    if(count==0 && oddCount==0){
        return true;
    }
    else if(count ==1 && oddCount==0){
        return true;
    }
    else if(count ==0 && oddCount==1){
        return true;
    }


    return false;

}
}
Code language: PHP (php)