private void tileIUser_ItemClick(object sender, DevExpress.XtraEditors.TileItemEventArgs e)
{
frmDepartmentMain frmView = new frmDepartmentMain();
AddTab(frmView);
}
private void tileIDepartmentStaff_ItemClick(object sender, DevExpress.XtraEditors.TileItemEventArgs e)
{
frmDepartmentMain obj = new frmDepartmentMain();
AddTab(obj);
}