Find Number of White Spaces..... i make this but its give me character numbering . but i want only white spaces anyone can help me

Question

#region Find Number of White Spaces

           int V = 0;

            string f;

            Console.WriteLine("Enter Paragraph: ");

            f = Console.ReadLine();

 

            Console.WriteLine("Total white spaces in Paragraph: " + V);

            Console.ReadLine();  

            #endregion