WebBrowser oraz Thread

                        LikeThread = new Thread(() => Like(webBrowser1));
                        LikeThread.Start();

        public void Like(WebBrowser u)
        {
                    

            do
            {
               
                
                  iloscdorefa++;
                    //lajkowanie
                  
                      foreach (String s in u.Document.All)
                      {
                          MessageBox.Show("" + s);
                      }

                      HtmlElementCollection lol = u.Document.GetElementsByTagName("like hintable");

                      foreach (HtmlElement ee in lol)
                          if (ee.GetAttribute("className") == "like hintable")
                          {
                              ee.InvokeMember("click");
                              break;
                          }
                      //foreach (HtmlElement ee in webBrowser1.Document.All)
                      //    if (ee.GetAttribute("className") == "like hintable")
                      //    {
                      //        ee.InvokeMember("click");
                      //        break;
                      //    }

                      //rozwijanie
                      if (iloscdorefa == 10)
                      {

                          foreach (HtmlElement ee in u.Document.All)
                              if (ee.GetAttribute("className") == "submit-button-more submit-button-more-active")
                                  ee.InvokeMember("click");

                          //Thread.Sleep(rnd.Next(500, 2000));
                          //foreach (HtmlElement ee in webBrowser1.Document.All)
                          //    if (ee.GetAttribute("className") == "submit-button-more submit-button-more-active")
                          //        ee.InvokeMember("click");

                          iloscdorefa = 0;
                      }

                    Thread.Sleep(rnd.Next(1000, 3500));
                
            }while (Dziala);

          }

System.InvalidCastException was unhandled
  Message=Określone rzutowanie jest nieprawidłowe.
  Source=System.Windows.Forms
  StackTrace:
       w System.Windows.Forms.UnsafeNativeMethods.IHTMLDocument2.GetLocation()
       w System.Windows.Forms.WebBrowser.get_Document()
       w AutomatyczneLajki.Form1.Like(WebBrowser u) w C:\Szkola\AutomatyczneLajki\AutomatyczneLajki\Form1.cs:wiersz 38
       w AutomatyczneLajki.Form1.<butLikeAll_Click>b__0() w C:\Szkola\AutomatyczneLajki\AutomatyczneLajki\Form1.cs:wiersz 124
       w System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       w System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       w System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       w System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

TlsStart = TlsAlloc() // pseudokod, TlsStart, TlsCount i TlsTab to globalne zmienne
TlsFree(TlsStart)

browser = new WebBrowser // ewentualnie otwarcie okna z browserem
browser.Navigate("about:blank") // niech się wszystko zainicjuje
// tu warto wstawić coś w stylu DoEvents(), dopóki browser.complete jest false

TlsCount = TlsAlloc()
TlsFree(TlsCount)

TlsTab = new array [TlsCount] of pointers // zapiszmy wszystko
for index = 0 to TlsCount-1
   TlsTab[index] = TlsGetValue(index)
next


public void Like(WebBrowser u) // wątek
{
	for index = TlsStart to TlsCount-1 // ustawmy tylko to, co z browsera
		TlsSetValue(index, TlsTab[index])
	next
// dalej już bez zmian