XMLSerializer and custom strong typed Collection

This is my collection:

publicclass CarCollection : System.Collections.CollectionBase
{

public Carthis[int index]//This is my indexer
{
get
{
return (Car)this.List[index];
}
set
{
this.List[index] =value;
}
}

publicvoid Add(Car car)
{
this.List.Add(car);
}
//and some other functions, like remove, count, and so on
}

The car class is a simple class that has some public properties.
The last class that i have is a ResultClass. The reason that i have this class is that i have read that u cant serialize a class that inherits from System.Collections.CollectionBase. Therefore i have made a ResultClass that has a CarCollection property and some other props, the ResultClass works as a wrapper.

my serializer:

privatestaticstring ConvertObjectToXML(object sourceObject)
{
XmlSerializer xmls =new XmlSerializer(sourceObject.GetType());
StringBuilder sb =new StringBuilder();
StringWriter sw =new StringWriter(sb);
XmlTextWriter xmltw =new XmlTextWriter(sw);
xmltw.Formatting = Formatting.None;
xmls.Serialize(xmltw, sourceObject);
return sb.ToString();
}

I call the serializer like this
ConvertObjectToXML(resultClass)

When i look in the XML file that is generated, the resultClass is a attribute element it shoud be a root element with child element/attributes.

does anyone know how to serialize a object that contains a collection property?

- Best regard YarakMan

[3136 byte] By [YarakMan] at [2008-2-27]