c# - Data Annotations Fails -

In my C # class I am a property to decorate with data annotation to validate the 5 digit number. The number should be minimum and maximum 5 digits in length. But it is not always saying valid. What's wrong with my regular expression?

\ d [0-9] group

{5} if you know the required length.

{1,5} If you want to specify minimum (1) and maximum (5) lengths, you can do it.