using System;

using System.Reflection;

public class Program

{

    public static void Main()

    {

        var outer = new OuterProduct();

        CheckTheProperties(outer);

    }

    public static void CheckTheProperties(object test)

    {

        if (test is null) // base case 

           return;

​

        var type = test.GetType();

​

        foreach (PropertyInfo property in type.GetProperties())

        {

            if (property.PropertyType == typeof(InnerProduct))

            {

                Console.WriteLine("Inner Product - " + property.Name);

                Console.WriteLine("Nested? " + property.PropertyType.IsNested);

            }

        }

    }

}

​

public class OuterProduct

{

    public string ProductName { get; set; }

    public int AmountSold { get; set; }

    public InnerProduct InnerProduct { get; set; }

}

​

public class InnerProduct

{

    public string ProductNameInner { get; set; }

    public int AmountSoldInner { get; set; }

}