public string name,phone;
public override string ToString()
return id+" "+name+" "+phone+" " ;
public Person(int ID,string Name) : this(ID)
public Person(int ID,string Name,string Phone) : this(ID,Name)
public class Student : Person
public Student(int ID,string Name) : base(ID)
public Student(int ID,string Name,string Phone) : base(ID,Name)
public Student(int ID,string Name,string Phone,string std) : base(ID,Name,Phone)
Console.WriteLine(id+" "+name+" "+phone+" "+Std);
public static void Main(string[] args)
Person a = new Person(10,"deep","6354041276");
Student q = new Student(1,"bhavy","6354041276","12");
Console.WriteLine(q.ToString());
Console.WriteLine(a.ToString());