using System;

public interface IDisposableObject : IDisposable

{

}

​

public class DisposableObject : IDisposableObject

{

    public RandomObjectB B {get; set;}

    public DisposableObject()

    {

        B = new RandomObjectB { B = 200 };

    }

    public void Dispose()

    {

        Dispose(true);

        GC.SuppressFinalize(this);

    }

    protected virtual void Dispose(bool disposing)

    {

        //Some Activity

    }

    public RandomObjectA CreateRandomObjectA()

    {

        return new RandomObjectA { A = 100 };

    }

}

​

public class RandomObjectA

{

    public int A { get; set; }

}

​

public class RandomObjectB

{

    public int B { get; set; }

}

​

public class Program

{

    public static void Main()

    {

        RandomObjectA AInst;

        using(var dObj = new DisposableObject())

        {

            AInst = dObj.CreateRandomObjectA();

            Console.WriteLine("Inside Using");

            Console.WriteLine($"AInst : {AInst.A}");

        }

        Console.WriteLine("Outside Using");

        Console.WriteLine($"AInst : {AInst.A}");

​

    }

}