asp.net mvc - MVC5 DataAnnotations - Accept Specific Numbers -


how can set viewmodel accept specific values data annotation? example, want input values form 2 or 4. i'm looking [range(2, 4)], still accepts numbers in between. want list specific numbers accept.

[required] public int numberparticipants { get; set; }

also looking same thing strings.

[regularexpression("^(2|4)$", errormessage = "please enter 2 or 4")]

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