using System;

using FluentAssertions;

​

public class Obj

{

    public string Str

    {

        get;

        set;

    }

​

    public Obj Nested

    {

        get;

        set;

    }

}

​

public class Program

{

    public static void Main()

    {

        var first = new Obj()

        {

        Nested = null, Str = "test"

        }

​

        ;

        var second = new Obj()

        {

        Nested = first, Str = "test"

        }

​

        ;

        first.ShouldBeEquivalentTo(second, o => o.ExcludingNestedObjects());

    }

}