string text = "<span id=\"name\">Inner Text</span>";
Regex testRegex = new Regex("<span id=\"name\">(.*?)</span>");
MatchCollection matches = testRegex.Matches(text);
this.txtInfo.AppendText("Number of matches = " + matches.Count + Environment.NewLine);
foreach (Match match in matches)
{
this.txtInfo.AppendText("Matches = " + match.Value + Environment.NewLine);
}