RegexHelper

#region RegexMail
public bool RegexMail(string email)
{
    try
    {
        string pattern = @"^[a-z][a-z|0-9|]*([_][a-z|0-9]+)*([.][a-z|" +
        @"0-9]+([_][a-z|0-9]+)*)?@[a-z][a-z|0-9|]*\.([a-z]" +
        @"[a-z|0-9]*(\.[a-z][a-z|0-9]*)?)$";
        System.Text.RegularExpressions.Match match = Regex.Match(email, pattern, RegexOptions.IgnoreCase);
        if (match.Success)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    catch (Exception ex)
    {
        return false;
    }
}
#endregion