private void btnCross_Click(object sender, EventArgs e)
{
btnNew.PerformClick();
this.Visible = false;
ManagerDetails m = new ManagerDetails();
m.Visible = true;
}
private void pbManagers_click(object sender, EventArgs e)
{
pnlMain.Controls.Clear();
ManagerDetails md = new ManagerDetails();
md.TopLevel = false;
md.Dock = DockStyle.Fill;
md.FormBorderStyle = FormBorderStyle.None;
pnlMain.Controls.Add(md);
md.Show();
}