/// <summary>
/// show rubric click event
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Form1_Load(object sender, EventArgs e)
{
panelHome.Controls.Clear();
panelHome.Controls.Add(StudentsUserControl.getInstance());
}
/// <summary>
/// show students click event
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
panelHome.Controls.Clear();
panelHome.Controls.Add(StudentsUserControl.getInstance());
}