Find Duplicate Records in ArrayList

In this blog we will find Duplicate Records present in ArrayList and display those to a listbox.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Collections;
namespace Duplicate_Records_in_ArrayList
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            var list = new ArrayList { "Raj", "Raj", "Ravi", "Rahul", "Ravi", "Rohan", "Rajesh", "Rahul" };
            var clone =
                (from string item in list select item).GroupBy(s => s).Select(
                    group => new { Word = group.Key, Count = group.Count() }).Where(x => x.Count >=
2);

            foreach (var duplicate in clone)
            {
                listBox1.Items.Add(duplicate.Word);
            }
          
        }
    }
}