using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

using System.Collections.Generic;

​

    class Words {

        public string MyWords { get; set; }

    }

​

public class Program    

{

    public static void Main()

    {

      List<Words> _words = new List<Words>();

      _words.Add(new Words() { MyWords = "apple" });

      _words.Add(new Words() { MyWords = "pear" });

      _words.Add(new Words() { MyWords = "apple" });

       RemoveDuplicatesLinq(_words);

    }   

        static void RemoveDuplicatesLinq(List<Words> _words) {

            List<Words> duplicatesRemoved = new List<Words>();

            duplicatesRemoved = _words.GroupBy(x => x)

                        .Where(group => group.Count() > 1)

                        .Select(group => group.Key).ToList();  

            foreach (var item in duplicatesRemoved) {

                Console.Write("Words Left " + item.MyWords + "\r\n");

            }

        }

}