private void Dgv_Invoices_MouseDoubleClick(object sender, MouseEventArgs e)
 {
     try
     {
         Program.i2 = Convert.ToInt32(dgv_Invoices.CurrentRow.Cells[0].Value);
         ViewAch view = new ViewAch();
         view.Show();
     }
     catch
     {
         return;
     }
 }
 void mousedblClick()
 {
     try
     {
         Program.i2 = Convert.ToInt32(dgv_Invoices.CurrentRow.Cells[0].Value);
         ViewAch view = new ViewAch();
         view.Show();
     }
     catch
     {
         return;
     }
 }