doubt regarding modal popup and DataGridViewLinkColumn in window application

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C#

I have link in datagridview which is at start I want link column should be placed at last how to do this?

DataGridViewLinkColumn link = new DataGridViewLinkColumn();
           link.UseColumnTextForLinkValue = true;


           link.HeaderText = "Click to View";

           link.DataPropertyName = "lnkColumn";

           link.ActiveLinkColor = Color.White;

           link.LinkColor = Color.Blue;

           link.Text = "More";


          DgvregistrationList.Columns.Add(link);

I used this code for creating link by default link should be place in start i want end how to do this??
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private void DgvregistrationList_CellContentClick(object sender, DataGridViewCellEventArgs e)
       {
           if (e.ColumnIndex == 0)
           {
               int row;
               //Get the row index
               row = e.RowIndex;
                   View_Registration.name = DgvregistrationList.Rows[row].Cells[1].Value.ToString();
 View_Registration obj = new View_Registration();
                obj.ShowDialog(this);
}
}

on click of link button new popup window(View_Registration form) appear.i have done this.but i want this window should not go back until it will close form how to do this??