RealtimeAnalysis.FormPRM.buttonPlotSolutionSpace_Click C# (CSharp) Method

        private void buttonPlotSolutionSpace_Click(object sender, EventArgs e)
        {
            InputInvalidationCheck();

            if (comboBoxScheduler.SelectedItem.ToString() == "RM")
            {
                if (comboBoxApproach.SelectedItem.ToString() == "Exhaustive search")
                {
                    buttonSolutionSpaceRM_Click(null, null);
                }
                else if (comboBoxApproach.SelectedItem.ToString() == "Abstraction bound")
                {
                    buttonABunderRM_Click(null, null);
                }
            }
            else if (comboBoxScheduler.SelectedItem.ToString() == "EDF")
            {
                if (comboBoxApproach.SelectedItem.ToString() == "Exhaustive search")
                {
                    buttonSolutionSpaceEDF_Click(null, null);
                }
                else if (comboBoxApproach.SelectedItem.ToString() == "Abstraction bound")
                {
                    buttonABunderEDF_Click(null, null);
                }
            }

        }
        private void buttonCheck_Click(object sender, EventArgs e)