unity3d 注册判断邮箱格式

bool CheckEMailValidly(string eMail)
    {

//是否为空
        if (eMail == "")
        {
            string error = XMLManager.Instance.ErrorCode.GetInfoById(100010).Value;
            ErrorMessage.Instance.ShowErrorMessage("", error);
            return false;
        }
 //string res = string.Empty; 
  
 
  
//是否为邮箱格式
        string expression = @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$";
        if (!System.Text.RegularExpressions.Regex.IsMatch(eMail, expression))
        {
            string error = XMLManager.Instance.ErrorCode.GetInfoById(100011).Value;
            ErrorMessage.Instance.ShowErrorMessage("", error);
            return false; 
        }
 
  


        return true;
    }