using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string originalXpath = "//div[contains(., '{0}')]";

        string inputString = "bjhe'bf83785*^{}^$#%!'edferferf'034**()";

        string output = FormatWithConcat(inputString, originalXpath);

        Console.WriteLine(output); 

        // Output: //div[contains(., concat('bjhe', "'", 'bf83785*^{}^$#%!', "'", 'edferferf', "'", '034**()'))]

    }

    private static string FormatWithConcat(string inputString, string originalXpath)

    {

        if (!inputString.Contains('\''))

        {

            return string.Format(originalXpath, inputString);

        }

        string replacementString = "concat('" + inputString.Replace("'", "', \"'\", '") + "')"; // Replace single quotes and concatenate with 'concat' function

        string finalString = originalXpath.Replace("'{0}'", replacementString); // Replace the placeholder '{0}' in the original XPath with the replacement string

        return finalString;

    }

}