private void buttonItem2_Click(object sender, EventArgs e)
{
controlPanel.Controls.Clear();
ucProductManagement ucpm = new ucProductManagement();
ucpm.Dock = DockStyle.Fill;
controlPanel.Controls.Add(ucpm);
}
private void buttonItem2_Click_1(object sender, EventArgs e)
{
ucProductManagement product = new ucProductManagement();
controlPanel.Controls.Clear();
product.Dock = DockStyle.Fill;
controlPanel.Controls.Add(product);
}