private void staffReportBtn_Click(object sender, EventArgs e) { if (PnlContainer.Controls.ContainsKey("StaffReport")) { int index = PnlContainer.Controls.IndexOfKey("StaffReport"); PnlContainer.Controls[index].BringToFront(); } else { StaffReport staffReport = new StaffReport(); staffReport.Dock = DockStyle.Fill; PnlContainer.Controls.Add(staffReport); staffReport.BringToFront(); } }