c# Array Part I

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace ArraysPartOne
{
    class Program
    {
        static void Main(string[] args)
        {
            /*
             * sometimes programmers needs to use
             * multiple objects of the same type(value types or reference types)
             * so we use arrays.
             * Definition of array -> is a data structure that contains a number of
             * elements of the same type. (Professional C# 2008 Wrox)
             */
 
            /*
             * how to declare an array?
             * so there are many ways on how to declare an array
             * just try to look below
             */
 
            int[] _FirstArray = new int[5];
 
            int[] _SecondArray = new int[2] {4,5,6};
 
            int[] _ThirdArray = new int[] { 4, 5, 6 };
 
            int[] _FourthArray = { 6,7,8};
 
            // end of declaring or initilizing an array
 
            //start of our sample array
            try
            {
 
                Console.WriteLine("Array Sample Part I");
 
                int intInputNumber =0;
                int intCounter =0;
 
                Console.WriteLine("How many number to want to input");
 
 
                intInputNumber = int.Parse (Console.ReadLine());
 
                int [] _UserArray = new int[intInputNumber];
 
 
 
                do
                {
                    Console.WriteLine(
                    string.Format
                   ("Input numbers at index[{0}]",intCounter ));
 
                    _UserArray[intCounter] = int.Parse(Console.ReadLine());
 
                    intCounter++;
 
                }while (intCounter < intInputNumber);
 
 
                //iterate throught the elements in the array ,
               //i'll be using for and foreach loop
 
                Console.WriteLine("Iterate elements using for loop");
 
                for (int i = 0;
                         i < _UserArray.Length; i++)
                {
                    string strMessage =
                    string.Format
                   ("Array Index [{0}] = [{1}]", i, _UserArray[i]);
 
                    Console.WriteLine(strMessage + Environment.NewLine);
                }
 
                Console.WriteLine("Iterate elements using foreach loop");
 
                StringBuilder result = new StringBuilder();
 
                foreach (int IndexValue in _UserArray)
                {
                    result.Append(IndexValue);
                    result.Append(",");
                }
 
                Console.WriteLine(result);
 
                Console.WriteLine("Do you want to sort the array?[y/n]");
 
                string ans = Console.ReadLine();
 
                if (ans.ToUpper().Equals("Y"))
                {
                    Array.Sort(_UserArray);
 
                }
 
                //iterate throught the elements
               //in the array ,i'll be using for  loop
 
                Console.WriteLine("Iterate elements using for loop");
 
                for (int i = 0; i < _UserArray.Length; i++)
                {
                    string strMessage =
                    string.Format
                    ("Array Index [{0}] = [{1}]",
                                    i, _UserArray[i]);
 
                    Console.WriteLine
                    (strMessage + Environment.NewLine);
                }
 
                Console.ReadKey();
 
            }
            // a wrong index value,
            //IndexOutOfRangeException will be thrown
 
            catch (IndexOutOfRangeException ex)
            {
                Console.WriteLine(ex.Message);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
 
            }
        }
    }
}