DataAnnotations中用于电子邮件验证的C#Regular Expression - 双反斜杠

using System;
using System.Text.RegularExpressions;

public class EmailValidator
{
    public static bool IsValidEmail(string email)
    {
        string pattern = @"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$";
        return Regex.IsMatch(email, pattern);
    }
}

string pattern = @"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$";
return Regex.IsMatch(email, pattern) && email.Length > 0;