Hanging HtmlAgilityPack Task

[Mead Alsorani]

am trying to parse an html page with HtmlAgilityPack to Extract links from it then add links to ListBox then add the links from listBox to queue.
I have three Tasks(PageParse,AddItemsToList,EnqueueFromList)
OK My problem is when I click the button the whole Application is hanging.
button Code

private void CrawdBtn_Click(object sender, EventArgs e)
{
t = Task.Factory.StartNew(PageParse);
t.Wait();
TaskAddToList = Task.Factory.StartNew(() => AddItemsToList(t.Result));
TaskAddToList.Wait();

b = new Task(EnqueueFromList);
b.Start();
//Task.WaitAll(t,b);
CrawdBtn.Enabled = true;

}

Page Parse Method

public HtmlAgilityPack.HtmlDocument PageParse()
{
MessageBox.Show($"Page Parse Has started");

web = new HtmlWeb();
doc = new HtmlAgilityPack.HtmlDocument();
doc = web.Load(UrlText.Text);



return doc;
}

I have Noticed by following breakpoints That the debugger is hanging when it goes to execute PageParse Method

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