using System;

using System.Collections.Generic;

using System.Text;

public class Program

{

    public static void Main()

    {

        List<string> lst = new List<string>(); // Create new list of strings

        lst.Add("Technology"); // Add string 1

        lst.Add("Crowds"); // 2

        lst.Add("Harsh"); // 3

        lst.Add("Krish"); // 4

​

        StringBuilder builder = new StringBuilder();

        foreach (string item in lst) // Loop through all strings

        {

            builder.Append(item).Append("|"); // Append string to StringBuilder

        }

        string result = builder.ToString(); // Get string from StringBuilder

        Console.WriteLine(result);

    }

}