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How to call base class parameterized constructor first in c#?

We can use the base keyword to call base class parameterized constructor first.

The example and the output result as given below.

namespace ConsoleNamespace
{
    class A
    {
        public A()
        {
            Console.WriteLine("class A::Constructor()");
        }
        public A(string name)
        {
            Console.WriteLine("class A::Constructor() with params name: "+ name);
        }
    }
    class B :A
    {
        public B()
        {
            Console.WriteLine("class B::Constructor()");
            Console.ReadLine();
        }
        public B(string name) : base(name)
        {
            Console.WriteLine("class B::Constructor() with params name: " + name);
            Console.ReadLine();
        }
    }
    class Test
    {
        static void Main(string[] args)
        {
            B a = new B("Anil Singh");
        }
    }
}


The Output as below,