c# - XML serialization: class within a class -

i serializing xml, , had working simple class, when made secondary class, of simple class component, serialization stopped working. fails "error reflecting type" error @ serialization stage. code follows:

public class customfield {     [xmlattribute("fieldid")]     public string fieldid;     [xmlattribute("fieldvalue")]     public string fieldvalue;     public customfield() { }     public customfield(string fieldid, string fieldvalue)     {         this.fieldid = fieldid;         this.fieldvalue = fieldvalue;     } } [xmltype("entry")] public class customentry {     [xmlattribute("author")]     public string author;     [xmlattribute("title")]     public string title;     [xmlattribute("trial")]     public string trial;     [xmlattribute("responses")]     public list<customfield> responses;     public customentry() { } } public static class entryserializer {     public static void serializeobject(this customentry entry, string file)     {         var serializer = new xmlserializer(typeof(customentry));         using (var stream = file.openwrite(file))         {             serializer.serialize(stream, entry);         }     } } 

is labeling issue xml markers, or else?

try defining serializer this:

var serializer = new xmlserializer(typeof(customentry), new type[] { typeof(customfield) }); 

you need inform serializer of additional types expecting serialize.