How to set values of parent objects using reflection in C#

I have code that would recursively parse an unknown object structure. But I want to be able to change values of the member objects of the parent object. How can I do this with this code?

    void CompareObjects(ref object currentObject)
    {
            Type currentType = currentObject.GetType();
            PropertyInfo[] properties = currentType.GetProperties();
            foreach (PropertyInfo property in properties)
            {
                object current_object = currentType.GetProperty(property.Name).GetValue(currentObject));
                CompareObjects(ref current_object);
            }
    }