using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using System.Xml;

​

public class Program

{

    public static void Main()

    {

        {

            string strText = "'hello'";

            strText.Replace("'", "''");

            Console.WriteLine("text1: " + strText);

        }

        {

            string strText = "'hello'";

            strText = strText.Replace("'", "''");

            Console.WriteLine("text2: " + strText);

        }

    }

}