C# Stack

C# Stack

In C# the Stack collection is the special type of collection that stores elements in LIFO (Last in First out) style. The Stack collection is available in both generic and non-generic types of collection classes so it is present in both System.Collection.Generic and System.Collection namespace.

Let’s see the simple code example of the generic Stack collection.

 
using System;
using System.Collections;
using System.Collections.Generic;

namespace ConsoleAppDemo
{
    class Program
    {
        static void Main(string[] args)
        {

            Stack stackDemo = new Stack();
            stackDemo.Push(1);
            stackDemo.Push(2);
            stackDemo.Push(3);
            stackDemo.Push(4);

            foreach (var item in stackDemo)
            { 
                Console.Write(item + "\n");
            }


            Console.ReadKey();
        }
    }
}

Output:

4
3
2
1

We can also use the non-generic type of Stack collection to add any types of elements.

 
using System;
using System.Collections;
using System.Collections.Generic;

namespace ConsoleAppDemo
{
    class Program
    {
        static void Main(string[] args)
        {

            Stack stackDemo = new Stack();
            stackDemo.Push("One");
            stackDemo.Push(2);
            stackDemo.Push("Josh");
            stackDemo.Push("C");

            foreach (var item in stackDemo)
            { 
                Console.Write(item + "\n");
            }


            Console.ReadKey();
        }
    }
}

Output:

C
Josh
2
One