Need help in a school programming test : I have two lists called standards and credits. The standards list is added to a combo box. When I click an item in the combo box i want to be able to show an item in the credits list. For example i click first index in the combo box, I want to show item in the first index of the credits list. I have this code but it gives me an error i can't fix it
    
        private void cboStandard1_SelectedIndexChanged(object sender, EventArgs e)
        {
          
       


            if (cboStandard1.SelectedIndex + 1 > 0)
            {

                lblCredits.Text = credits.ElementAt(standard.IndexOf(cboStandard1.Text));

            }

        }