Get Object Type

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TypeOf
{
    class Program
    {
        static void Main(string[] args)
        {
            IA a = new A1();
            IA b = new A2();
            IA c = new A3();
            var d = new A4();
            var list = new ArrayList();
            list.Add(a);
            list.Add(b);
            list.Add(c);
            list.Add(d);
            foreach (var item in list)
            {
                Console.Write(item.GetType());
                if (item is IA)
                {
                    Console.Write(" is IA");
                }
                if (item is BaseA)
                {
                    Console.Write(" is BaseA");
                }
                Console.Write(" Based from" + item.GetType().BaseType);
                foreach (var ifType in item.GetType().GetInterfaces())
                {
                    Console.Write(" Implemented " + ifType);
                }

                Console.WriteLine();
            }
            Console.ReadKey();
        }
    }
    public class A1: BaseA,IA { }
    public class A2: IA, IB { }
    public class A3: BaseA,IA { }
    public class A4: BaseA { }

    interface IA
    {

    }

    interface IB
    {

    }
    public abstract class BaseA
    {

    }
}