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Editorial Team
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Asked: 2026-06-05T13:43:21+00:00

I am trying to attach Watin to an existing instance of Internet Explorer 9.

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I am trying to attach Watin to an existing instance of Internet Explorer 9. The trouble is no matter what I try it seems to just timeout. The code I am using is:

Settings.AttachToBrowserTimeOut = 240;
Settings.WaitUntilExistsTimeOut = 240;
Settings.WaitForCompleteTimeOut = 240;   

Browser.AttachTo<IE>(Find.ByTitle("Google"), 240);

This code is what is in the Watin guide here minus the timeout adjustments I have tried. I have also tried setting the code to run x86 not any cpu but still not working. Any ideas what I am doing wrong.

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1 Answer

  1. Editorial Team

    The method you write in is missing the single threaded ApartmentState. The easiest way to fix this is to add [STAThread] above the method where you’re trying to use that code.

    For example this:

    //[STAThread]
static void Main(string[] args)
{
    IE.AttachTo<IE>(Find.ByTitle("Google"), 5);
}

    acts like you described. When you uncomment the [STAThread]

    [STAThread]
static void Main(string[] args)
{
    IE.AttachTo<IE>(Find.ByTitle("Google"), 5);
}

    it works as intented.

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