how to create save function for datagridview visual basic 2012

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VB

SQL-Server-2012

i'm using visual studio 2012 and SQL server 2012 to make form to copy data in datagridview to another datagridview.

this is my coding:

Public Class Form3

    Private Sub Form3_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        DataGridView1.AllowUserToAddRows = False
        DataGridView2.AllowUserToAddRows = False
        ClassKoneksi.namadatabase = "KPIRWAN"
        Dim dssiswa As New DataSet
        Dim sql As String
        sql = "select*from Siswa order by NIS ASC"
        dssiswa = ClassSiswa.displayData(ClassSiswa.opencon, sql, "DataSiswa")
        DataGridView1.DataSource = dssiswa
        DataGridView1.DataMember = "DataSiswa"
        DataGridView1.ReadOnly = True
        DataGridView2.ColumnCount = DataGridView1.ColumnCount
        For a = 0 To DataGridView1.ColumnCount
            DataGridView2.Columns(a).Name = DataGridView1.Columns(a).Name
        Next a
        ClassSiswa.closecon()
    End Sub

    Private Sub ButtonCopy_Click(sender As Object, e As EventArgs) Handles ButtonCopy.Click
        Dim dr As New System.Windows.Forms.DataGridViewRow
        For Each dr In Me.DataGridView1.SelectedRows
            Me.DataGridView2.Rows.Add(dr.Cells(0).Value,
                                      dr.Cells(1).Value,
                                      dr.Cells(2).Value,
                                      dr.Cells(3).Value,
                                      dr.Cells(4).Value,
                                      dr.Cells(5).Value)

        Next
    End Sub

    Private Sub ButtonDel_Click(sender As Object, e As EventArgs) Handles ButtonDel.Click
        Dim LastRow As DataGridViewRow = (From this In DataGridView2.Rows.OfType(Of DataGridViewRow)() Where Not this.IsNewRow).LastOrDefault
        If LastRow IsNot Nothing Then
            DataGridView2.Rows.Remove(LastRow)
        End If
    End Sub
End Class

the function of this form is:

- button "copy" is used to copy the row from the top datagridview to the bottom datagridview.

- using button "delete" the row in the bottom datagridview will be removed.

the problem is:
after i copy the row in the top datagridview to the bottom datagridview i closed the form.but,after i run the program again the row in the bottom datagridview disappear.

what i want is to create a save function using button save so that after i copied the row on the top datagridview to the bottom datagridview, the row in the bottom datagridview will stay there when i running the program again.

how do i create a coding to do that?