private void CloseDealerProfile_Click(object sender, EventArgs e) { dashboardpanel.Hide(); BillViewContainer.Hide(); AmountPayment.Hide(); SearchPanel.Visible = true; SearchPanel.BringToFront(); if (f1 != null && !f1.IsDisposed) { f1.Close(); f1.Hide(); f1.Dispose(); f1 = null; } if (f2 != null && !f2.IsDisposed) { f2.Close(); f2.Hide(); f2.Dispose(); f2 = null; } if (f3 != null && !f3.IsDisposed) { f3.Close(); f3.Hide(); f3.Dispose(); f3 = null; } if (f4 != null && !f4.IsDisposed) { f4.Close(); f4.Hide(); f4.Dispose(); f4 = null; } }