private void button3_Click(object sender, EventArgs e) { if (AdminProfil.Addtype == 0) { var Add = new StudentController(); var Telebe = new Student(); Telebe.Name = Name.Text; Telebe.Surname = Surname.Text; Telebe.Username = Username.Text; Telebe.Age = Age.Text; Telebe.Teacher_Id = idmellim; Telebe.Password = Password.Text; Telebe.Class_Id = Convert.ToInt32(Class.SelectedItem.ToString()); Add.Add(Telebe); } if (AdminProfil.Addtype == 1) { var Add = new TeacherController(); var mellim = new Teacher(); mellim.Name = Name.Text; mellim.Surname = Surname.Text; mellim.Username = Username.Text; mellim.Age = Age.Text; mellim.Student_id = idmellim; mellim.Password = Password.Text; mellim.Class_id = idmellim; Add.Add(mellim); } }