.NET (Core and Framework)

public class ClassA
{
    private bool _reversed = false;
}

public class ClassB
{
    private ClassA _objectA1 = new ClassA();
    private ClassA _objectA2 = new ClassA();

    private ClassB _previous = null;
    private ClassB _next = null;
}

public class ClassBContainer:ICollection<ClassB>
{
    private List<ClassB> _innerList = new List<ClassB>();
}

public class Form1:Form
{
    private ClassBContainer _devices = new ClassBContainer();

    private void BtSave_Click(object sender, EventArgs e)
    {
        // Save _devices to disk
    }

    private void BtLoad_Click(object sender, EventArgs e)
    {
        // _devices = Load(filename);
    }
}

GetObjectData(SerializationInfo info, StreamingContext context);

Constructor(SerializationInfo info, StreamingContext context);