using System.Collections.Generic;
public static void Main()
string ad = "class= adsbygoogle style= display:block;text-align:center; data-ad-layout= in-article data-ad-format= fluid data-ad-client= ca-pub-5105528667051233 data-ad-slot= 1029303696";
string stringWithQoutes = AddQoutesToAd(ad);
Console.WriteLine(stringWithQoutes);
private static string AddQoutesToAd(string input){
input = input.Replace(" ","\" ");
input = input.Insert(input.Length,"\"");