private void btn_RubricLevel_Click(object sender, EventArgs e)
 {
     RubricLevel.getInstance().Show();
     RubricLevel.getInstance().Refresh();
     RubricLevel.getInstance().Location = this.Location;
     this.Hide();
 }
 public static RubricLevel getInstance()
 {
     if (instance == null)
     {
         instance = new RubricLevel();
     }
     return(instance);
 }
        private void btn_RubricLevel_Click(object sender, EventArgs e)
        {
            RubricLevel RL = new RubricLevel();

            RL.Show();
            RL.Refresh();
            RL.Location = this.Location;
            this.Close();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            RubricLevel RL = new RubricLevel();

            RL.Show();
            RL.Refresh();
            RL.Location = this.Location;
            this.Hide();
        }