private void Form1_Load(object sender, EventArgs e) { //TeachingAssistant ta = new TeachingAssistant(); TeachingAssistant4 ta = new TeachingAssistant4(); // The following causes a design time error for the // TeachingAssistant4 class but not the TeachingAssistant class. ta.PrintGrades(); // The following does work. IStudent student = ta; student.PrintGrades(); }
static void Main(string[] args) { // Console.WriteLine("Hello World!"); TeachingAssistant ta = new TeachingAssistant(); IStudent iStudent = new TeachingAssistant4(); // The following causes a design time error for the // TeachingAssistant4 class but not the TeachingAssistant class. ta.PrintGrades(); iStudent.PrintGrades(); // The following does work. IStudent student = ta; student.PrintGrades(); }