just a question about classes

[MrPolite]

I'm making a class and I will be making about 30 objects from that class. Would it be bad to declare all the constants of my class as shared? like this:

Public Class FFUser
       Shared ReadOnly TAG_ADMIN As String = "isAdmin"
       Shared ReadOnly TAG_USERNAME As String = "UserName"
       ....
       Public Function ...
End Class

I was just thinking that this would save some memory if I create 30 or more instances of this class
Am I wrong

thanks in advance