C# Stack Demo
By Michael Ganesan

This is a sample application demonstrating the use of the Stack Class.
Data is added and removed from the stack in the order the elements were inserted.

using System;
using System.Collections;

namespace StackImplementation
{
 /// 

 /// Implement the stack class
 /// Created by: Michael Ganesan
 /// Date: 09/02/2001
 /// Note: Pop: removes an element from the stack
 /// Peek: Allows the user to view the top element in the collection
 /// 
 /// 
 public class MyStack
 {
  //variables
  public MyStack()
  {
   _mystack = new Stack();
  }
  public void PushElement(int x)
  {
   //Push an element onto a stack
   if (x>0)
    _mystack.Push(x);
  }
  public int PopElement()
  {
   //Pop and element off the stack  
   if (_mystack.Count>0)
   {
    //boxing 
    object i = _mystack.Pop();
    return((int)i);
   }
   else
   return(0);
  }

  public int PeekElement()
  {
   //View the top element on the stack
   if (_mystack.Count>0)
   {
    object i=_mystack.Peek();
    return((int)i);
   }
   else
   return(0);
  }

  public void print_Elements()
  {
   //print all of the elements on the stack
   if (_mystack.Count>0)
   {
    System.Collections.IEnumerator myenum =_mystack.GetEnumerator();
    while(myenum.MoveNext())
    {
     Console.WriteLine("Element: {0}",myenum.Current);
    }
    Console.WriteLine("Press any key to continue!");
    Console.ReadLine();
   }
  }

  //private variables
  private Stack _mystack;
 }

 class Class1
 {
  static void Main(string[] args)
  {
   MyStack t = new MyStack();
   //Push 10 elements onto the stack
   for(int i=0;i<10;i++)
   {
    t.PushElement(i);
   }
   Console.WriteLine("Current Stack Values!");
   t.print_Elements();
   //Pop the last element: Remove the last element
   t.PopElement();
   
   //print the contents of the Stack
   Console.WriteLine("The Contents of the stack is: ");
   t.print_Elements();

   //Print the top element of the stack
   Console.WriteLine("Top Element of the stack: {0}",t.PeekElement());
   t.print_Elements();
  }
 }
}