How to sort elements in the ListBox in C#?

In Windows Forms, ListBox control is used to show multiple elements in a list, from which a user can select one or more elements and the elements are generally displayed in multiple columns. In ListBox, you are allowed to sort the elements present in the ListBox using Sorted Property of the ListBox. This property always sorts the string type elements in the alphabetical order and integer type elements in ascending order. The default value of this property is false. You can set this property in two different ways:

1. Design-Time: It is the easiest way to sort the elements present in the ListBox as shown in the following steps:

  • Step 1: Create a windows form as shown in the below image:
    Visual Studio -> File -> New -> Project -> WindowsFormApp
  • Step 2: Drag the ListBox control from the ToolBox and drop it on the windows form. You are allowed to place a ListBox control anywhere on the windows form according to your need.
  • Step 3: After drag and drop you will go to the properties of the ListBox control to sort the elements of the ListBox.


2. Run-Time: It is a little bit trickier than the above method. In this method, you can sort the elements present in the ListBox control programmatically with the help of given syntax:

public bool Sorted { get; set; }

Here, the value of this property is of System.Boolean type. If you want to sort the elements present in the Listbox, then set the value of this property to true. Otherwise, false. The following steps show how to set the Sorted property of the ListBox dynamically:

  • Step 1: Create a list box using the ListBox() constructor is provided by the ListBox class.
    // Creating ListBox using ListBox class constructor
    ListBox lstbox = new ListBox();
  • Step 2: After creating ListBox, set the Sorted property of the ListBox provided by the ListBox class.
    // Sorting the elements of the listbox
    lstbox.Sorted = true;
  • Step 3: And last add this ListBox control to the form using Add() method.
    // Add this ListBox to the form






    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    namespace WindowsFormsApp28 {
    public partial class Form1 : Form {
        public Form1()
        private void Form1_Load(object sender, EventArgs e)
            // Creating and setting the 
            // properties of the label
            Label lb = new Label();
            lb.Location = new Point(243, 80);
            lb.Text = "Select post";
            // Adding label control to the form
            // Creating and setting the
            // properties of ListBox
            ListBox lstbox = new ListBox();
            lstbox.Location = new Point(246, 104);
            lstbox.Sorted = true;
            lstbox.Items.Add("Software Engineer");
            lstbox.Items.Add("Project Manager");
            // Adding listbox control to the form




    Before sorting:

    After sorting:

My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using or mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Article Tags :

Be the First to upvote.

Please write to us at to report any issue with the above content.