using System;

using KellermanSoftware.CompareNetObjects;      

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var fields = typeof(A).GetFields().Where(f => !Attribute.IsDefined(f, typeof(CustomAttribute))).Select(p => p.Name).ToList();

        var bfields = typeof(B).GetFields().Where(f => !Attribute.IsDefined(f, typeof(CustomAttribute))).Select(p => $"B.{p.Name}");    

        fields.AddRange(bfields);

        Console.WriteLine(string.Join(", ", fields));

        CompareLogic compareLogic = new();      

        compareLogic.Config.MembersToIgnore = new (fields);

        compareLogic.Config.MaxDifferences = 50;

        var a = new A{X=1,Y=2,Z=3,E=4,C=5, B = new(){F=6, G=7, H=8, L=9, M=10}};

        var b = new A{X=10,Y=20,Z=30,E=40,C=50, B = new(){F=60, G=70, H=80, L=90, M=100}};

        Console.WriteLine(compareLogic.Compare(a,b).DifferencesString);

    }

}

​

public class A{

    [CustomAttribute]

    public int X;

    [CustomAttribute]

    public int Y;

    public int Z;

    public int E;

    public int C;   

    [CustomAttribute]

    public B B;

}

​

public class B : C {

    public int G;

    public int H;

    public int L;

    public int M;

}

​

public class C{

[CustomAttribute]

    public int F;

}

​

[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field)]

public class CustomAttribute: Attribute{

    public bool CompareInner;

    public CustomAttribute(bool compareInner = false): base(){CompareInner = compareInner;}

}