public InstructorViewModel(Instructor selectedInstructor)
        {
            ModifyableInstructor = selectedInstructor;

            modify = true;
            _instructor = new Instructor();
            _instructor.clone(selectedInstructor);

            insertInstructorWindow = new InsertInstructorWindow();

            insertInstructorWindow.DataContext = this;

            insertInstructorWindow.ShowDialog();
        }