Why am I picking up foreign characters and how can I remove them?

I am picking up extra characters (Â) compared to the source when I grab the InnerText of a H3 tag using the HTML Agility Pack.

I am not sure where these characters are coming from or how to remove them.

Extracted String:

 Week 1

HTML Source:

<h3>
<span> </span>Week 1</h3>

Current Code:

private void getWeekNumber(string url)
{
    HtmlAgilityPack.HtmlDocument htmlDoc = new HtmlAgilityPack.HtmlDocument();

    htmlDoc.Load(new System.IO.StringReader(url));

    foreach (HtmlAgilityPack.HtmlNode h3 in htmlDoc.DocumentNode.SelectNodes("//h3"))
    {
        MessageBox.Show(h3.InnerText);
    }
}

Current Workaround (Stolen from somewhere on stackoverflow, lost the link):

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

request.Method = "GET";

using (var stream = request.GetResponse().GetResponseStream())
using (var reader = new System.IO.StreamReader(stream, Encoding.UTF8))
{
    result = reader.ReadToEnd();
}

HtmlAgilityPack.HtmlDocument htmlDoc = new HtmlAgilityPack.HtmlDocument();

htmlDoc.Load(new System.IO.StringReader(result));

foreach (HtmlAgilityPack.HtmlNode h3 in htmlDoc.DocumentNode.SelectNodes("//h3"))
{
    MessageBox.Show(h3.InnerText);
}