A gazillionth implementation of a CSV Parser in C#...

CSV2HTMLTable.cs

public string ToHTMLTable(string CSVFilePath, string tableCaption)
{
    if (!File.Exists(CSVFilePath))
    {
        return "<div>--CSV file not found--</div>";
    }
    var sbHTable = new StringBuilder();
    var curLine = string.Empty;
    sbHTable.AppendFormat("<table><caption>{0}</caption>", tableCaption);
    foreach (var line in File.ReadLines(CSVFilePath))
    {
        sbHTable.Append("<tr>");
        var tokens = line.Split(new char[] { ',' }, StringSplitOptions.None);
        for (long i = 0; i < tokens.LongLength; i++)
        {
            var token = tokens[i];
            if (token.StartsWith("\"") && !token.EndsWith("\""))
            {
                var sbFullToken = new StringBuilder();
                while(!tokens[i].EndsWith("\""))
                {
                    sbFullToken.Append(tokens[i++]);
                }
                token = sbFullToken.ToString();
            }
            sbHTable.AppendFormat("<td>{0}</td>", string.IsNullOrWhiteSpace(token) ? "&mdash;" : token);
        }
        sbHTable.Append("</tr>");
    }
    sbHTable.Append("<tbody>");
    sbHTable.Append("</tbody></table>");
    return sbHTable.ToString();
}