C# 如何为嵌套类实现 IEnumerable

问：

我有一组相当简单的类，只有属性，例如：

using System;               //main data types
using System.Reflection;    //to iterate through all properties of an object
using System.Collections;   //for IEnumerable implementation?

namespace ConsoleApp1
{
    public class WholeBase //: IEnumerable ?
    {
        public SomeHeaders Headers { get; set; }
        public SomeBody Body { get; set; }
    }

    public partial class SomeHeaders
    {
        public string HeaderOne { get; set; }
        public string HeaderTwo { get; set; }
    }

    public partial class InSet
    {
        public string AllForward { get; set; }
        public string Available { get; set; }
    }

    public partial class SomeBody
    {
        public InSet MySet { get; internal set; }
        public Boolean CombinedServiceIndicator { get; set; }
        public int FrequencyPerDay { get; set; }
        public string ValidUntil { get; set; }
    }

我试图获取所有属性和值，但似乎我被卡住了，因为缺少 IEnumerable 或其他东西。这是我到目前为止尝试过的：填充属性并尝试遍历所有属性和值，但是不起作用......

  public class Program
{
    //...
    public static void Main(string[] args)
    {
        WholeBase NewThing = new WholeBase();
        NewThing.Headers = new SomeHeaders { HeaderOne = "First", HeaderTwo = "Second" };

        NewThing.Body = new SomeBody
        {
            MySet = new InSet { AllForward = "YES", Available = "YES"},
            CombinedServiceIndicator = false,
            FrequencyPerDay = 10,
            ValidUntil = "2019-12-31"
        };

        void SeeThrough(WholeBase myBase)
        {
            //iterate through all the properties of NewThing
            foreach (var element in myBase)
            {
                foreach (PropertyInfo prop in myBase.GetType().GetProperties())
                {
                    var type = Nullable.GetUnderlyingType(prop.PropertyType) ?? prop.PropertyType;
                    Console.WriteLine(prop.GetValue(element, null).ToString());
                }
            }
        };
    }
}