Not entering Equals() method in a class derived from Object

In the exact setup:

namespace NS
{
    class Program
    {
        static void Main(string[] args)
        {
            Object obj1 = new A();
            Object obj2 = new A();
            Console.WriteLine(obj1.GetType());
            Console.WriteLine(obj2.GetType());

            Console.WriteLine(obj1.Equals(obj2)); // why not entering A::Equals(A a)
            Console.ReadLine();
        }
    }
    class A
    {
        int x;
        public bool Equals(A a)
        {
            Console.WriteLine("enters Equals");
            return this.x == a.x;
        }
    }
}

I have the output from console app in C#:

NS.A
NS.A
False

Question: If ojb1 and obj1 are of type NS.A why public bool Equals(A a) is not entered?

Is Console.WriteLine(obj1.GetType()); "lies" about a real object type. I am confused?

I wanted to call A.Equals(A) method from code even though Object obj1 = new A();

I know I can fix the problem with A obj1 = new A(); but I am stuck with understanding why GetType() returns the A and I cannot call the A.Equals(A).

>Solution :

You need to let it know it is overriding and not creating a new function.

    public override bool Equals(object a)
    {
        Console.WriteLine("enters Equals");
        return ((A)this).x == ((A)a).x;
    }