using System;

using System.Collections.Generic;                   

public class Program

{

    public static void Main()

    {

        Customer c1=new Customer()

        {ID=111,Name="Preeti",Sal=90000};

        Customer c2=new Customer()

        {ID=112,Name="Deepak",Sal=50000};

        Customer c3=new Customer()

        {ID=113,Name="sanam",Sal=10000};

        /*Customer[] cc=new Customer[2];

        cc[0]=c1;

        cc[1]=c2;

        cc[2]=c3;*///this is array which cant grow in size

        List<Customer> cc=new List<Customer>(2);//List can grow in size

        cc.Add(c1);

        cc.Add(c2);

        cc.Add(c3);

        //to insert object at any position

        //cc.RemoveAll();

        //cc.Insert(0,c1);

        /*foreach(Customer c in cc)

        {

          Console.WriteLine("Customer info:ID={0} Name={1} Sal={2}",c.ID,c.Name,c.Sal);

         }*/

        //Console.WriteLine(cc.IndexOf(c3,1,3));//overloaded verion of indexof

        if(cc.Contains(c1))//contains() function

        {Console.WriteLine("CUSTOMER EXIST");}

        else

        {Console.WriteLine("CUSTOMER DOESNOT EXIST");}

        if(cc.Exists(cus => cus.Name.StartsWith("M")))//exists() function

        {Console.WriteLine("CUSTOMER EXIST");}

        else

        {Console.WriteLine("CUSTOMER DOESNOT EXIST");}

        Customer v=cc.Find(cus=>cus.Sal>10000);//Find() function returns first matching result

        Console.WriteLine("Customer info:ID={0} Name={1} Sal={2}",v.ID,v.Name,v.Sal);

        Customer n=cc.FindLast(cus=>cus.Sal>10000);//FindLast() function returns last matching result

        Console.WriteLine("Customer info:ID={0} Name={1} Sal={2}",n.ID,n.Name,n.Sal);

    List<Customer> a= cc.FindAll(cus=>cus.Sal>10000);//FindAll() function returns last matching result

        foreach(Customer f in a)

        {

        Console.WriteLine("Customer info:ID={0} Name={1} Sal={2}",f.ID,f.Name,f.Sal);

    }

    }

}

public class Customer

{

 public int ID{get;set;}

 public string Name{get;set;}

     public int Sal{get;set;}

}