using System;

public class Program

{

    public static void Main()

    {

        string str = "\"[\"1_1_1_1\",\"1_1_1_2\"]\"";

        string removeString = "\"";

        int index = str.IndexOf(removeString);

int length = removeString.Length;

String startOfString = str.Substring(0, index);

String endOfString = str.Substring(index + length);

String cleanPath = startOfString + endOfString;

        Console.WriteLine(str);

    }

}