private void ButtonStudents_Click(object sender, EventArgs e)
{
TabStudentControl = new TabStudents();
flowLayoutPanel1.Controls.Clear();
flowLayoutPanel1.Controls.Add(TabStudentControl);
ClearFlow(For.Student);
}
private void OnLoad()
{
flowLayoutPanel1.Controls.Clear();
flowLayoutPanel1.Controls.Add(TabStudentControl = new TabStudents());
}