Best Substitute for Enum of Strings?

[Evil_Giraffe]

Sounds like a Resource Dictionary would be useful to you. You create string entries, give them a name and VS will generate properties with the same name to access the values through.

The other option would be Shared properties:

Public Class DefaultMasks
    Public Shared ReadOnly Property PhoneNumber As String
        Get
            Return "(999)000-0000"
        End Get
    End Property
    Public Shared ReadOnly Property ZipCode As String
        Get
            Return "00000-9999"
        End Get
    End Property
End Class