The below program will do so
Class MainClass
Public Shared Sub Main(args As String())
Dim evenNumList = New List(Of Integer)()
Dim oddNumList = New List(Of Integer)()
GetEvenOddNumbersUsingOutParameters(evenNumList, oddNumList)
End Sub
Private Shared Sub GetEvenOddNumbersUsingOutParameters(ByRef evenNumList As List(Of Integer), ByRef oddNumList As List(Of Integer))
Dim numbers = Enumerable.Range(1, 20)
'generate numbers between 1 to 20
evenNumList = numbers.Where(Function(i) i Mod 2 = 0).ToList()
oddNumList = numbers.Where(Function(i) i Mod 2 <> 0).ToList()
End Sub
End Class