No connection could be made because the target machine actively refused it(selenium)

Question

I have extracted the following code from selenium IDE.(c# remote control)

using System;
using System.Text;
using System.Text.RegularExpressions;
using System.Thr         


        

Answer 1

I got this because a part of my code held a reference to a stale driver.

var driver1 = new OpenQA.Selenium.Firefox.FirefoxDriver();
driver1.Close();
driver1.Quit();
driver1.Dispose();

var x = driver1.FindElements(...);