using System;

public class Program

{

    /*** Write simple C# extension methods to word Count/character count ***/

    // string s = "Hello Extension Methods blah"; 

    // Word Count : 4

​

    public static void Main()

    {

        string s = "Hello Extension Methods blah? "; 

        int i = s.WordCount();

​

        Console.WriteLine("Word Count : " + i);

    }

}

​

public static class MyExtensions 

{

    public static int WordCount(this string str)

    {

        return str.Split(new char[] { ' ', '.', '?' }, StringSplitOptions.RemoveEmptyEntries).Length; 

    }

}

​