The Stack class embodies a highly efficient and intuitive last-in-first-out (LIFO) data structure, providing a robust means of organizing a collection of Objects. Following the push-pop paradigm, it offers the ability to seamlessly add items to the Stack (push) and subsequently retrieve them (pop) in reverse order, adhering to the Last In First Out principle.

When items are pushed onto the Stack, they are stored in a sequential manner, with the most recent addition occupying the topmost position. This arrangement ensures that the last item added to the Stack is the first to be retrieved. As elements are continuously added to the Stack, the capacity dynamically adjusts to accommodate the growing collection. This process is accomplished through automatic reallocation, eliminating the need for manual intervention and ensuring optimal space utilization.

Stack.Push(Object) : Add (Push) an item in the Stack data structure.
Dim st As New Stack st.Push("Sunday")
Stack st = new Stack(); st.Push("Sunday");
Object Stack.Pop() : Return the last object in the Stack

The following ASP.NET program push seven days in a week and bing it to a ListBox control.

<html xmlns=""> <head id="Head1" runat="server"> <title>Untitled Page</title> </head> <body> <form id="form1" runat="server"> <div> <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" /> <br /> <asp:ListBox ID="ListBox1" runat="server"></asp:ListBox><br /> </div> </form> </body> </html>
Full Source | C#
using System; using System.Collections; public partial class _Default : System.Web.UI.Page { protected void Button1_Click(object sender, EventArgs e) { Stack st = new Stack(); st.Push("Sunday"); st.Push("Monday"); st.Push("Tuesday"); st.Push("Wednesday"); st.Push("Thursday"); st.Push("Friday"); st.Push("Saturday"); ListBox1.DataSource = st; ListBox1.DataBind(); } }
Full Source | VB.NET
Partial Class _Default Inherits System.Web.UI.Page Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click Dim st As New Stack st.Push("Sunday") st.Push("Monday") st.Push("Tuesday") st.Push("Wednesday") st.Push("Thursday") st.Push("Friday") st.Push("Saturday") ListBox1.DataSource = st ListBox1.DataBind() End Sub End Class


By using the Stack class, developers can leverage its inherent LIFO behavior to efficiently manage data in a wide range of scenarios. Whether it be tracking function calls, undoing actions, or implementing depth-first search algorithms, the Stack provides a reliable and versatile mechanism for handling data in a last-in-first-out fashion.