using System;

public class Program

{

    public static void Main()

    {

        var templateURL = @"https://online.steppestravel.com/dhruvonlinepayment/onlinepayment.aspx?refno={0}&user={1}&hash={2}&success={3}&cenable={4}";

        var finalURL = string.Format(templateURL , 1 , "darshan" , @"djdjureujdjj#" , true , true);

        Console.WriteLine(finalURL);

    }

}