C# XMLSerializer on Lists and Ignoring Attributes

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C#

XmlSerializer

Dear Folk,
i got a fine working XMLSerializer for a sophisticated List of 3D model with many different elements. Now i want to serialize another List beside of that, that only saves few Elements of it. I just tried to bar some of them out with [XMLIgnore] but this causes problems in my deserialization. My plan is now to tag the attributes he should save. Could somebody give me a hint?

Heres the Code of my Serializer.

public void SerializeObject<T>(T serializableObject, string fileName)
     {
         if (serializableObject == null) return;

         var serializer = new XmlSerializer(serializableObject.GetType());

         using (var stream = File.Open(fileName, FileMode.Create))
         {
             serializer.Serialize(stream, serializableObject);
         }
     }

     public T DeserializeObject<T>(string fileName)
     {
         XmlAttributeOverrides overrides = new XmlAttributeOverrides();
         XmlAttributes attributes = new XmlAttributes();
         attributes.XmlIgnore = false;

         if (string.IsNullOrEmpty(fileName)) return default(T);

         var serializer = new XmlSerializer(typeof(T),overrides);

         using (var stream = File.Open(fileName, FileMode.Open))
         {
             return (T)serializer.Deserialize(stream);
         }
     }

I got attributes in the root of my List that i want to extract (and even more important, large number of elements that i want to remove) , aswell in sublists.

big thanks.