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What is Stack in C# ?

  • C# Stack<T> class is used to push and pop elements.
  • It uses the concept of Stack that arranges elements in LIFO (Last in First Out) order.
  • It can have duplicate elements.
  • It is found in System.Collections.Generic namespace.
 stack

C# Stack<T> example:

  • Let's see an example of generic Stack class that stores elements using Push() method, removes elements using Pop() method and iterates elements using for-each loop
 Stack

Stack

C# Sample Code - C# Examples:

using System;  
using System.Collections.Generic;  
  
public class StackExample  
{  
    public static void Main(string[] args)  
   {  
        Stack<string> names = new Stack<string>();  
        names.Push("Sonoo");  
        names.Push("Peter");  
       names.Push("James");  
        names.Push("Ratan");  
       names.Push("Irfan");  
  
        foreach (string name in names)  
        {  
            Console.WriteLine(name);  
        }  
  
        Console.WriteLine("Peek element: "+names.Peek());  
        Console.WriteLine("Pop: "+ names.Pop());  
        Console.WriteLine("After Pop, Peek element: " + names.Peek());  
  
    }  
}  
Sonoo
Peter
James
Ratan
Irfan
Peek element: Irfan
Pop: Irfan
After Pop, Peek element: Ratan

C# program that creates new Stack of integers

using System;
using System.Collections.Generic;

class Program
{
    static Stack<int> GetStack()
    {
        Stack<int> stack = new Stack<int>();
        stack.Push(100);
        stack.Push(1000);
        stack.Push(10000);
        return stack;
    }

    static void Main()
    {
        var stack = GetStack();
        Console.WriteLine("--- Stack contents ---");
        foreach (int i in stack)
        {
            Console.WriteLine(i);
        }
    }
}

Output

--- Stack contents ---
10000
1000
100

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