c# - Want to add a validation using regular expression the format should be like this xxxxx-xxxxxxx-x -


i trying put validation using regular expression value text box xxxxx-xxxxxxx-x here trying

 [required]     [display(name = "cnic")]     [regularexpression(@"^\(([0-9]{5})[-]([0-9]{7})[-][0-9]{1}\)$", errormessage = "entered cnic format not valid.")]     public string cnic { get; set; }

but shows cnic format not valid

[regularexpression(@"^[0-9+]{5}-[0-9+]{7}-[0-9]{1}$", errormessage = "entered cnic format not valid.")]

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