VB.NET - Delete duplicated rows

Hi all

I have this DataGridView2 with data in it.
I would like to delete all duplicated rows and leave only one of each.

Ex:
Based on above picture, it would remove one of the CustomerId 2.
I must say that the grid is not sorted. So it may not be one after the other.

This is what i have so far. But it only look at row.cell(1). It should account for all columns, no matter the number of columns the DataGridView2 could have.

Private Sub Button4_Click(sender As Object, e As EventArgs) Handles btnRemoveDuplication.Click
        For Loop1 As Integer = 0 To DataGridView2.Rows.Count - 2
            For Loop2 As Integer = Loop1 + 1 To DataGridView2.Rows.Count - 2
                If DataGridView2.Rows(Loop1).Cells(1).Value = DataGridView2.Rows(Loop2).Cells(1).Value Then
                    DataGridView2.Rows.RemoveAt(Loop2)
                End If
            Next
        Next
    End Sub

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Thank you for your help