Formatting proprty in C# : I am currently studying for an exam, while I was trying to write a class I saw this requirement for a property.I need to write this property in class called User.

"Phone – must be in the format “+[country_code]/[phone]” where [country_code] is between 1 and 3 digits and the [phone] is between 8 and 10 digits. 
o	Valid phones: +123/88888888, +1/1234579284
o	Invalid phones: -123/88888888, +123/      4    5 4444444, +123348585313, +123\34553363587"

Do I use "[RegularExpression()]" from ComponentModel.DataAnnotations or something else