谁能帮我解释一下这段代码，是有关xml数据流的

Question

public static object DeSerializer(string sXml,System.Type type)
{
System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(type);
System.IO.StringReader reader = new System.IO.StringReader(sXml);
return serializer.Deserialize(reader);
} public static string Serializer(object objToXml)
{
System.IO.StringWriter writer = new System.IO.StringWriter();
System.Xml.Serialization.XmlSerializer serializer= new System.Xml.Serialization.XmlSerializer(objToXml.GetType());
serializer.Serialize(writer,objToXml);
return writer.GetStringBuilder().ToString();
}