Dim i = 2
    Do While True
        i += 1
        If IsDBNull(TmDataSet.T.Rows(0)(i)) = True Then Exit Do
        Dim new_t As New train
        new_t.id = TmDataSet.T.Rows(0)(i)
        Dim j = 0
        Do Until IsDBNull(TmDataSet.T.Rows(j + 1)(i))
            j += 1
            Do Until (TmDataSet.T.Rows(j)(i) <> -1)
                j += 1
            Loop
            If IsDBNull(TmDataSet.T.Rows(j + 1)(i)) Then Exit Do
            Dim new_st As New station
            new_st.t = TmDataSet.T.Rows(j)(i)
            new_st.name = TmDataSet.T.Rows(j)(1)
            new_st.id = TmDataSet.T.Rows(j)(2)
            new_st.id_t = new_st.id.ToString & new_st.t
            Dim new_st2 As New station
            Do Until (TmDataSet.T.Rows(j + 1)(i) <> -1)
                j += 1
            Loop
            new_st2.t = TmDataSet.T.Rows(j + 1)(i)
            new_st2.name = TmDataSet.T.Rows(j + 1)(1)
            new_st2.id = TmDataSet.T.Rows(j + 1)(2)
            new_st2.id_t = new_st2.id.ToString & new_st2.t

            Dim list As New List(Of station)
            list.Add(new_st)
            list.Add(new_st2)
            new_t.st.Add(list)
        Loop
        per_network.Add(new_t)
    Loop

'red = copia profunda de per_network

vb >>> Solo quiero copiar el contenido de per_network a la red, probé el método ToList pero fue una copia superficial y no pude realizar el método de clonación. No lo obtuve en absoluto