Možeš da koristiš listu klasa (potraži na Google-u List(of T)).
Ukratko. Napraviš klasu sa adekvatnim imenom i svojstvima (properties) koji čine željenu strukturu (u ovom primeru naziv je Worker a struktura: FirstName, LastName, EmploymentContractStartDate i Income).
Klasa može da bude u odvojenom fajlu, ja sam ovde stavio u isti radi lakšeg prikaza.
Pomoću Linq-ovih moćnih funkcija iz ovakvih lista možeš da dobiješ različite agregatne i druge podatke, da primeniš razne filtere i slično.
Code:
Public Class Form1
Public Sub DoSomething()
Dim MojaKolekcija As New List(Of Worker)
MojaKolekcija.Add(New Worker() With {.FirstName = "John", .LastName = "Doe", .EmploymentContractStartDate = New DateTime(2010, 1, 1), .Income = 50000})
End Sub
End Class
Public Class Worker
Private _firstName As String
Public Property FirstName() As String
Get
Return _firstName
End Get
Set(ByVal value As String)
_firstName = value
End Set
End Property
Private _lastName As String
Public Property LastName() As String
Get
Return _lastName
End Get
Set(ByVal value As String)
_lastName = value
End Set
End Property
Private _employmentContractStartDate As DateTime
Public Property EmploymentContractStartDate() As DateTime
Get
Return _employmentContractStartDate
End Get
Set(ByVal value As DateTime)
_employmentContractStartDate = value
End Set
End Property
Private _income As Decimal
Public Property Income() As Decimal
Get
Return _income
End Get
Set(ByVal value As Decimal)
_income = value
End Set
End Property
End Class
VB. NET - List(Of String)