验证电子邮件地址

string expression = @"^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$";

System.Text.RegularExpressions.Regex regEmail = new System.Text.RegularExpressions.Regex（expression);

if(regEmail.IsMatch(TxtEMail.Tex.Trim()))

      return true;

else

      return false;