Найти количество слов в тексте, начинающихся с символа ‘b’

static void Main(string[] args)
        {
              string str = "Internet is very useful, because it is a huge base of data and knowledge, " +
                                "where you can find any thing you want from movies and music of interest to the vast number of books, " +
                                "newspapers and magazines.";
 
            if (str[0] == 'b') 
 
 
 
        }

string str = "Internet is very useful, because it is a huge base of data and knowledge, " +
                                "where you can find any thing you want from movies and music of interest to the vast number of books, " +
                                "newspapers and magazines.";
 int count=0; foreach(var s in str.Split(new char[]{' '})) if(s[0].ToString()=="b") count++;
Console.WriteLine(count);

class Program
    {
        static void Main(string[] args)
        {
            var s = Console.ReadLine();
 
            Console.WriteLine("Исходное предложение: {0}", s);
 
            Console.WriteLine();
 
            var words = s.Split(new[] { ' ', ',', ';', '.' });
 
            var count = words.Count(f => f != "" && (f.First() == 'b' || f.First() == 'B'));
 
            Console.WriteLine("Найдено {0} слов начинающихся на букву <b>", count);
 
            Console.ReadLine();
        }
    }

static void Main(string[] args)
        {
              string str = "Internet is very useful, because it is a huge base of data and knowledge, " +
                                "where you can find any thing you want from movies and music of interest to the vast number of books, " +
                                "newspapers and magazines.";
            int count = 0;
            for (int i = 0; i < str.Length; i++)
            {
                if (str[i].ToString() == "b") count++;
            }
 
            Console.WriteLine(count);
 
 
        }

int count = str.Split(new char[] {' '}).Count(s => s[0].ToString() == "b");