Here's a snippet from my test program. Hopefully you get the idea.

#using <mscorlib.dll>
#using <System.Xml.dll>

using namespace std;
using namespace LX;
using namespace System::Xml::Serialization;
using namespace System::Xml;
using namespace System;
using namespace System;
using namespace System::Collections;

public __gc class foo
{
public:
 foo()
 {
 }

 foo(System::String* s)
 {
   _s = s;
 }
public:
 [XmlAttributeAttribute(S"name")]
 System::String* _s;
};

public __gc class land_xml
{
public:
 land_xml()
 {
   arr = new System::Collections::ArrayList();
   m_collection = new GeoPointBaseCollection();
   System::String* s = new System::String("Daniel");
   m_collection->Add(s);
 }

public:
 [XmlArray(S"Alignments")]
 [XmlArrayItemAttribute(S"Alignment",__typeof(foo))]
 System::Collections::ArrayList* arr;

 [System::Xml::Serialization::XmlAttributeAttribute("Alignments")]
 GeoPointBaseCollection* m_collection;
};

int test()
{
 using namespace System;
 using namespace System::Xml;
 using namespace System::Xml::Serialization;
 using namespace System::IO;

 land_xml* m_land_xml = new land_xml();
 XmlSerializer* xs = new XmlSerializer(__typeof(land_xml));
 XmlTextWriter* writer = new XmlTextWriter("land_xml2.xml",
System::Text::Encoding::UTF8);
 writer->Formatting = Formatting::Indented;
 xs->Serialize(writer, m_land_xml);
 writer->Close();
 return 0;
}