Question

I am having troubling reading my values out of an ArrayList. The compiler goes into the ReadOutFromArray function, but skips the Console.WriteLine(st)? Can anyone tell me where I went wrong. Been on it for a couple of hours chasing my tail. Thanks.

using System;
using System.IO;
using System.Collections.Generic;
using System.Collections;
using System.Text;

namespace BoolEx
{
    class Program
    {
        static void Decision(ArrayList decis)
        {
            bool ans = true;

            decis = new ArrayList();
            //ArrayList aList = new ArrayList();
            while (ans)
            {
                Console.WriteLine("1=True 0=False");
                int x = Int32.Parse(Console.ReadLine());

                if (x == 1)
                {
                    ans = true;
                }
                else
                {
                    ans = false;
                }

                if (ans == true)
                {
                    ReadInArray(decis);
                }
                else
                {

                    ReadOutArray(decis);
                }
            }
        }
        static void ReadInArray(ArrayList f)
        { 
            f= new ArrayList();
            Console.WriteLine("Enter in a name");
            f.Add(Console.ReadLine());
        }

        static void ReadOutArray(ArrayList d)
        {
            d = new ArrayList();
            ReadInArray(d);

            foreach (string st in d)
            {
                Console.WriteLine(st);
            }
        }

        static void Main(string[] args)
        { 
            ArrayList g = new ArrayList();
            Decision(g);
        }
    }
}

Answer 1

Although I do agree with everything Skeet has mentioned, it appears the poster is trying to understand some things and I think
Jon might have missed that.

First if all you want to do is fill a list and print it try this:

static void (main)
 {
   ArrayList l = new ArrayList();
   FillMyList(l);
   DisplayMyList(l);
 }

public static void FillMyList(ArrayList temp)
 {
  for(int i = 0; i < 10; i++)
     temp.Add(i);
 }

public static void DisplayMyList(ArrayList temp)
 { 
 foreach(int i in temp)
  Console.WriteLine(i);
 }

Second thing is take what Jon Skeet has mentioned and definately understand some things. Booleans are just true / false (unless you introduce the nullable types) but for now keep it simple.
ArrayList is really old school, it kind of suffers like the HashTable in that you can easily run into trouble adding different data types into the object (read up on boxing of data types and unboxing).
Finally, you should really replace anything with this System.Collection.ArrayList to System.Collections.Generic.List.

The list class is a generic class and is made available so that you don’t have to deal with the issues that you could encounter when dealing with array lists or hash tables.

Edit

I noticed you were asking users to add items to the list. You can do this using a do while loop instead of the for loop I posted, something to this effect (note i have not tested any of this):

public static void FillMyList(ArrayList temp)
 {
  char c='y';

  do {
     Console.WriteLine("Enter a value");
     int x = Int32.Parse(Console.ReadLine());  
     temp.Add(x);
     Console.WriteLine("Continue adding numbers to list, if so type y");
     char c = Console.ReadLine();
  }while(c=='y' || c=='Y');
 }

Again I am just giving you examples here, you will have to handle user input in case someone doesn’t enter the correct information, exceptions, etc.