Question

Which constructor will called first in the below example? When i put break point and execute it first pointed to child constructor but executed the parent class constructor, why this?

could any one please clarify me?

class Program
    {
        static void Main(string[] args)
        {
            Child child = new Child();
            child.print();
            Console.ReadLine();

        }
    }
public class Parent
{
    public Parent()
    {
        Console.WriteLine("Parent Constructor.");
    }

    public void print()
    {
        Console.WriteLine("I'm a Parent Class.");
    }
}

    public class Child : Parent
    {
        public Child()
        {
            Console.WriteLine("Child Constructor.");
        }
        public new void print()
        {
            Console.WriteLine("I'm a Child Class.");
        }
    }

Answer 1

Constructors, when generated from C#, are invoked base-class first, so:

• object()
• then Parent()
• then Child()

Essentially the chained base:.ctor({args}) is prepended to the local .ctor

For this reason you should avoid calling virtual methods during construction, as if Child overrides it, it could fail as Child hasn’t initialized the fields defined there yet (they will be zeros).

In C++/CLI you get to choose what order to do things.