ExtractOddOccuredStrings

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace _02ExtractOddStrings
{
    class OddStrings
    {

        static void ExtractOddOccuredStrings(string[] str, Dictionary<string, int> dictionary)
        {
            foreach (var s in str)
            {
                int occurs = 1;
                if (dictionary.ContainsKey(s))
                {
                    occurs = dictionary[s] + 1;
                }
                dictionary[s] = occurs;
            }
        }
        static void Print(Dictionary<string, int> dict)
        {
            int size = dict.Count;
            int count = 0;
            Console.Write("{");
            foreach (var item in dict)
            {
                if (item.Value %2==1)
                {
                    Console.Write("{0}", item.Key, item.Value);
                }
                if (count < size-2)
                {
                    Console.Write(", ");
                }
                count++;
            }
            Console.WriteLine("}");
        }
        static void Main(string[] args)
        {
            Dictionary<string, int> dictionary = new Dictionary<string, int>();
            string[] str = { "C#", "SQL", "PHP", "PHP", "SQL", "SQL" };

            ExtractOddOccuredStrings(str, dictionary);
            Print(dictionary);
        }
    }
}