Simple Id Validation C#

using System;
using System.Text.RegularExpressions;

public class SimpleIdValidation
{
    public static bool Validate(string id)
    {
    //---XXXXX--- with X alphanumeric and at least length of 1/at most of 5
     Regex regex = new Regex(@"(\-){3}([A-Za-z0-9]){1,5}(\-){3}");
     Match match = regex.Match(id);
     return (match.Success);
    }
}