1protected string obfuscate(string input)
2{
3
4	string email = string.Empty;
5
6	MatchCollection matches = Regex.Matches(input, @"[a-zA-Z]+[a-zA-Z0-9]*[\.|\-|_]?[a-zA-Z0-9]+@([a-zA-Z]+[a-zA-Z0-9]*[\.|\-|_]?[a-zA-Z]+[a-zA-Z0-9]*[a-zA-Z0-9]+){1,4}\.[a-zA-Z]{2,4}", RegexOptions.Singleline | RegexOptions.IgnoreCase);
7
8	foreach (Match match in matches)
9	{
10		email = string.Empty;
11		Array matcharray = match.Value.ToCharArray();
12		foreach (char letter in matcharray)
13		{
14			email += "&#" + Convert.ToInt32(letter).ToString() + ";";
15		}
16
17		input = input.Substring(0, match.Index)+email+input.Substring((match.Index+match.Length));
18	}
19	return input;
20}

string obf_string = obfuscate(input);