Email Validation

 [RegularExpression(@"^(([\w-]+\.)+[\w-]+|([a-zA-Z]{1}|[\w-]{2,}))@"
     + @"((([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\.([0-1]?
    [0-9]{1,2}|25[0-5]|2[0-4][0-9])\."
     + @"([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\.([0-1]?
    [0-9]{1,2}|25[0-5]|2[0-4][0-9])){1}|"
     + @"([a-zA-Z0-9]+\.)+[a-zA-Z]{1}[a-zA-Z0-9-]{1,23})$", ErrorMessage = "Invalid Email Address.")]
       // [Remote("CheckDuplicateEmail", "User", AdditionalFields = "UserID", ErrorMessage = "Email ID Already Exists.")]
        [Display(Name = "Email ID")]
        public string EmailID { get; set; }