static uint CountSentenc(string s)
{
    uint count = 0;
    string[] sentences = s.Split('.');
   
    Console.WriteLine(s);
    foreach (string sentence in sentences) 
    {
        string[] words = sentence.Split(new char[] { ' ', ',', '-' });
        if (words.Length % 2 != 0)
            count++;
        //Console.WriteLine("{0}:={1}",count, sentence);
    }
    return count;
}