int switchvar = 1;
               switch (switchvar)
               {

                   case 1:
                    if (Age >= 17 && Age < 21 && SwitchFinal < 20)
                    {

                        MessageBox.Show("Candidate is Eligible!");

                    }
                    else
                    {
                        MessageBox.Show("Candidate is Not Eligible");
                    }
                    break;

                case 2:
                    if (Age >= 21 && Age < 28 && SwitchFinal < 22)
                    {

                        MessageBox.Show("Candidate is Eligible!");

                    }
                    else
                    {
                        MessageBox.Show("Candidate is Not Eligible");
                    }
                    break;
                case 3:
                    if (Age >= 28 && Age <40 && SwitchFinal < 24)
                    {

                        MessageBox.Show("Candidate is Eligible!");

                    }
                    else
                    {
                        MessageBox.Show("Candidate is Not Eligible");
                    }
                    break;

                case 4:
                    if (Age >= 40 &&  SwitchFinal < 24)
                    {

                        MessageBox.Show("Candidate is Eligible!");

                    }
                    else
                    {
                        MessageBox.Show("Candidate is Not Eligible");
                    }
                    break;