static void Main(string[] args) { Student s1 = new Student("Ahmed", "*****@*****.**", "Civil", "MU", 01234567890); Student s2 = new Student("Ahmed"); Student s3 = new Student("Alaa"); Student s4 = new Student("Adel", "*****@*****.**", "CS", "MU", 2644660); s4.print(); s1.print(); s2.print(); s3.print(); Student.ObjNum(); }