How to add rows to DataGridView with list values in vb.net

Hello,

I'm using below code to add values to datagridviews according to their types.

                For Each force In forceList
                    Dim tp As TabPage = DirectCast(tabCtrl.Controls("tabCheckForceOut_" & force.type.val.ToString), TabPage)
                    Dim dgv As DataGridView = DirectCast(tp.Controls("dgvCheckForceOut_" & force.type.val.ToString), DataGridView)
                    dgv.Rows.Add(force.parent, force.name)
                Next

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I have also function like below and it's returning a list of double.

        Private Function EvaluateForce(ByVal xObj As IScrForce) As List(Of Double)
            Dim ovNumber As Integer = xObj.getNumOv
            Dim resList As New List(Of Double)
            For i As Integer = 1 To ovNumber
                resList.Add(CoreGlobal.Base.Server.Spck.Slv.eval("FORCEOV(" + xObj.fullName + "," & i & ")"))
            Next
            Return resList
        End Function

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In normally if the output value number is certain for each type of force it'll be easy for me to add rows like that.

Dim result As List (Of Double) = EvaluateForce(force)
dgv.Rows.Add(force.parent, force.name, result.item(0), result.item(1), result.item(2))

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As you can see if i know "result" list has 3 items it's easy for me to add.

But if i dont know the list size/ item number how is it possible to add row to DataGridView?

Thank you.