Generics Use Extension Methods

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Demos

{

    //For creating a static method class shoud be static

    public static class clsUserExtenstionMethod

    {

        //the first parameter type will be associated with "this" keyword

        //Ex:this string s

        //For string object it will get the intellisence

        public static int MyWordCount(this string s)

        {

            return s.Split(' ').Count();

        }

        //

        public static int CalcBonus(this Employee e, int rate)

        {

            return e.Salary * rate / 100;

        }

    }

    class TestUserExtentionMethod

    {

        static void Main()

        {

            CallingExtentionMethod();

            CalCulatingBonus();

        }

        public static void CallingExtentionMethod()

        {

            string msg = "test";

            int x = msg.MyWordCount();

        }      

        private static void CalCulatingBonus()

        {

            foreach (Employee emp in EmployeeList())

            {

                //Calling the User Custom Method

                Console.WriteLine("Bonus {0}", emp.CalcBonus(30));

            }

        }

       

        private static List<Employee> EmployeeList()

        {

            List<Employee> empList = new List<Employee> { new Employee { EmpNo = 1013, EmpName = "Umakar", Dept = "Student", Salary = 15000 },

                                                          new Employee { EmpNo = 1010, EmpName = "Venu", Dept = "HR", Salary = 12000 } };

            return empList;

        }

    }

    public class Employee

    {

        //Step 1

        public int EmpNo { get; set; }

        public string EmpName { get; set; }

        public string Dept { get; set; }

        public int Salary { get; set; }

    }

}