private void btndistrict_Click(object sender, EventArgs e)
{
FrmDistrictDetails frm = FrmDistrictDetails.getinstance();
frm.TopLevel = false;
btnlist.Controls.Add(frm);
frm.BringToFront();
frm.Show();
SidePanel.Height = btndistrict.Height;
SidePanel.Top = btndistrict.Top;
}