Get all members (Props, fields) of a class, with in a class

Hi,

I'm looking for an efficient way to get all properties/ fields of complex type which internally have Properties of another complex type.

class A
{
public int Id{get;set;}
public string Name{get;set;}
public List<string> Branch{get;set;}
public BuildData build {get;set;}
public SampleData sample {get;set;}
public DummyData dData {get;set}
//constructor
public A(){}
}
class BuildData{
private string _buildData;
public string param1{get;set;}
public string[] paramArgs{get;set;}
}
class SampleData {
public string Test{get;set;}
public List dummyArgs{get;set;}
}
class DummyData {
public int Val{get;set;}
public string GUIData{get;set;}
}

I have to use class A & get all its members (fields, Props) which should also include members of other complex types such as DummyData, BuildData, SampleData.

I tried using Reflection but couldn't get all members. Followed this article (https://www.c-sharpcorner.com/UploadFile/ff2f08/deep-copy-of-object-in-C-Sharp/) - but couldn't achieve it.