private void btnLocation_Click(object sender, EventArgs e)
{
frmLocation oLocation = new frmLocation();
oLocation.Show();
LoadAllLocation();
}
private void locationToolStripMenuItem_Click(object sender, EventArgs e)
{
CloseAllChild();
frmLocation ofrmLocation = new frmLocation();
ofrmLocation.MdiParent = this;
ofrmLocation.Show();
}