使用HTML Agility Pack時出現編碼錯誤

我正在嘗試使用我從這個實際網站找到的一些代碼來解析一個html doc但是我一直得到一個解析錯誤

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

        // There are various options, set as needed
        htmlDoc.OptionFixNestedTags = true;

        // filePath is a path to a file containing the html
        htmlDoc.Load(@"C:\Documents and Settings\Mine\My Documents\Random.html");

        // Use:  htmlDoc.LoadXML(xmlString);  to load from a string

        // ParseErrors is an ArrayList containing any errors from the Load statement
        if (htmlDoc.ParseErrors != null && htmlDoc.ParseErrors.Count > 0)
        {
            // Handle any parse errors as required
            MessageBox.Show("Oh no");
        }
        else
        {

            if (htmlDoc.DocumentNode != null)
            {
                HtmlAgilityPack.HtmlNode bodyNode = htmlDoc.DocumentNode.SelectSingleNode("//head");

                if (bodyNode != null)
                {
                    MessageBox.Show("Hello");
                }
            }
        }

任何幫助，將不勝感激 ：）