WebException thrown but never gets caught

Question

I have the following code:

try
{
    using (var myHttpWebResponse = (HttpWebResponse) httPrequestCreated.GetResponse())
    {
        var streamResponse = myHttpWebResponse.GetResponseStream();

        if (streamResponse != null)
        {
            var streamRead = new StreamReader(streamResponse);
            var readBuff = new Char[256];
            var count = streamRead.Read(readBuff, 0, 256);         

            while (count > 0)
            {
                var outputData = new String(readBuff, 0, count);
                finalResopnse += outputData;
                count = streamRead.Read(readBuff, 0, 256);
            }
            streamRead.Close();
            streamResponse.Close();
            myHttpWebResponse.Close();

        }
    }
}
catch (WebException ex)
{
    MessageBox.Show("something went wrong");
}

The error code is 404 Not Found, but instead of a MessageBox I get the following error:

Why is the exception never caught?

Answer 1

You probably have first chance exception catching turned on in Visual Studio.

Try running the application without debugger (Ctrl+F5). Or, if you get this dialog, you can press Run (F5) to get your message box.