public string name;a
        public int age;
        public bool ID;
        private int salary;
        public void Staff()
        {
            Console.WriteLine("enter your name");
            name = Console.ReadLine();
            Console.WriteLine("enter your age : ");
            age = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("enter your ID:");
            ID = Console.ReadLine();
            Console.WriteLine("enter your salary:");
            income = Convert.ToInt32(Console.ReadLine());

using System;
using System.Collections.Generic;
using System.Text;
 
namespace ConsoleApplication54
{
    struct human
    {
 
        public string name;
        public int age;
        public int ID;
        private int salary;
        public void Staff()
        {
            Console.WriteLine("enter your name");
            name = Console.ReadLine();
            Console.WriteLine("enter your age : ");
            age = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("enter your ID:");
            ID = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("enter your salary:");
            salary = Convert.ToInt32(Console.ReadLine());
        }
 
 
 
        class Program
        {
            static void Main(string[] args)
            {
                string[] cArray = new string[5] { "Cha3123", "Cha1234", "Cha1243", "Cha34", "Cha53" };
                Array.Sort(cArray, StringComparer);
                foreach (string s in cArray)
                {
                    Console.WriteLine(s);
                }
                Console.ReadLine();
            }
            static int StringComparer(object a, object b)
            {
                int stra = Convert.ToInt32((a as string).Remove(0, 3));
                int strb = Convert.ToInt32((b as string).Remove(0, 3));
                return stra - strb;
            }
        }
    }
}