Public Class Form1
 
    Dim textbox1 As New TextBox
 
    Private Sub Form1_Load(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles MyBase.Load
 
        Dim lst As New List(Of List(Of TextBox))
 
        textbox1.Text = "Mein Text"
        lst.Add(New List(Of TextBox))
        lst(0).Add(textbox1)
 
        Dim t As String = lst(0)(0).Text
 
    End Sub
End Class