XmlSerializer saves null file

Question

I have a problem with serializing my objects. I implemented the IXmlSerializable interface and initialized an XmlSerializer object (e.g. serializer). But sometimes after calling serializer.Serialize (writer, data) my output file looks like this:

Why do I have this behavior?

public class MyClass : IData { private static readonly XmlSerializer _formatter = new XmlSerializer(typeof(MyData)); public void Save(string filePath) { using (StreamWriter writer = new StreamWriter(filePath)) { Save(writer); writer.Close(); } } public void Save(TextWriter Writer) { MyData data = GetMyDataObject(); _formatter.Serialize(Writer, data); } private MyData GetMyDataObject() { MyData data = new MyData (); foreach (PropertyDescriptor pd in TypeDescriptor.GetProperties(typeof(IData))) pd.SetValue(data, pd.GetValue(this)); return data; } } public class MyData : IData, IXmlSerializable { public void WriteXml(System.Xml.XmlWriter writer) { writer.WriteAttributeString("Number", Number); if (HardwareInformation != null) { writer.WriteStartElement("HWInfoList"); foreach (KeyValuePair<string, string> kw in HardwareInformation) { writer.WriteStartElement("HWInfo"); writer.WriteAttributeString("Key", kw.Key); writer.WriteAttributeString("Value", kw.Value); writer.WriteEndElement(); } writer.WriteEndElement(); } } } public interface IData { Dictionary<string, string> HardwareInformation { get; set; } string Number { get; set; } } 

Answer 1

How do you serialize? The following is an example of a Serialize function

  private XDocument Serialize<T>(object obj) { XDocument ReturnValue = new XDocument(); XmlSerializer Serializer = new XmlSerializer(typeof(T)); System.IO.StringWriter sw = new System.IO.StringWriter(); System.IO.StringReader sr; Serializer.Serialize(sw, obj); sr = new System.IO.StringReader(sw.ToString()); ReturnValue = XDocument.Load(sr); return ReturnValue; }