public Function MeinFunction(p1 as String, p2() as String, p3()()() as Object, _
  p4 as String) As String

dim s as String = MeinFunction("p1", {"p2_1", "p2_2"},  {{{"p3", 1}, {"p3", _
  2}}, {{1, 2, 3}}}, ",")

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Jeder, der behauptet das gesamte .NET-Framework zu kennen ist entweder verrückt oder Sheldon Cooper