private void insertNodeToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //upon this click the form should pop up

            Form_Input_For_Seriespoint form_point_input = new Form_Input_For_Seriespoint(this);
            form_point_input.Show();

        }
        private void insertNodeToolStripMenuItem_Click_1(object sender, EventArgs e)
        {
            //--Insert node got nothing...
            Form_Input_For_Seriespoint form_point_input = new Form_Input_For_Seriespoint(this);
            form_point_input.Show();

        }