diff --git a/src/Cuemon.Xml/Extensions/Serialization/Converters/XmlConverterDecoratorExtensions.cs b/src/Cuemon.Xml/Extensions/Serialization/Converters/XmlConverterDecoratorExtensions.cs
index 3eedc3c6..f1fd4f50 100644
--- a/src/Cuemon.Xml/Extensions/Serialization/Converters/XmlConverterDecoratorExtensions.cs
+++ b/src/Cuemon.Xml/Extensions/Serialization/Converters/XmlConverterDecoratorExtensions.cs
@@ -112,7 +112,7 @@ public static IDecorator<IList<XmlConverter>> AddEnumerableConverter(this IDecor
                 {
                     if (isDictionaryLike)
                     {
-                        w.WriteStartElement(q.LocalName);
+                        w.WriteStartElement(q.Prefix, q.LocalName, q.Namespace);
                         foreach (var element in o)
                         {
                             var elementType = element.GetType();
@@ -125,31 +125,38 @@ public static IDecorator<IList<XmlConverter>> AddEnumerableConverter(this IDecor
                             var keyName = Decorator.Enclose(keyValue.ToString()).SanitizeXmlElementName();
                             if (Decorator.Enclose(valuePropertyType).IsComplex())
                             {
-                                Decorator.Enclose(w).WriteObject(valueValue, valuePropertyType, opts => opts.Settings.RootName = new XmlQualifiedEntity(keyName));
+                                Decorator.Enclose(w).WriteObject(valueValue, valuePropertyType, opts => opts.Settings.RootName = new XmlQualifiedEntity(keyName, q.Namespace));
                             }
                             else
                             {
-                                w.WriteElementString(keyName, Convert.ToString(valueValue, CultureInfo.InvariantCulture));
+                                w.WriteStartElement(keyName, q.Namespace);
+                                w.WriteValue(valueValue);
+                                w.WriteEndElement();
                             }
                         }
                         w.WriteEndElement();
                     }
                     else
                     {
+                        var isDocumentRoot = w.WriteState == WriteState.Start;
+                        if (isDocumentRoot) { w.WriteStartElement(q.Prefix, q.LocalName, q.Namespace); }
+                        var qe = new XmlQualifiedEntity(q.Prefix, q.LocalName, q.Namespace);
                         foreach (var item in o)
                         {
                             if (item == null) { continue; }
                             var itemType = item.GetType();
                             if (Decorator.Enclose(itemType).IsComplex())
                             {
-                                var localName = q.LocalName;
-                                Decorator.Enclose(w).WriteObject(item, itemType, opts => opts.Settings.RootName = new XmlQualifiedEntity(localName));
+                                Decorator.Enclose(w).WriteObject(item, itemType, opts => opts.Settings.RootName = qe);
                             }
                             else
                             {
-                                w.WriteElementString(q.LocalName, Convert.ToString(item, CultureInfo.InvariantCulture));
+                                w.WriteStartElement(q.Prefix, q.LocalName, q.Namespace);
+                                w.WriteValue(item);
+                                w.WriteEndElement();
                             }
                         }
+                        if (isDocumentRoot) { w.WriteEndElement(); }
                     }
                 }
                 else
diff --git a/src/Cuemon.Xml/Serialization/Formatters/XmlFormatterOptions.cs b/src/Cuemon.Xml/Serialization/Formatters/XmlFormatterOptions.cs
index 0c53ec69..7ea3beb1 100644
--- a/src/Cuemon.Xml/Serialization/Formatters/XmlFormatterOptions.cs
+++ b/src/Cuemon.Xml/Serialization/Formatters/XmlFormatterOptions.cs
@@ -129,9 +129,14 @@ internal XmlSerializerOptions RefreshWithConverterDependencies()
                     _refreshed = true;
                     if (Settings.FlattenCollectionItems)
                     {
-                        var existing = Decorator.Enclose(Settings.Converters).FirstOrDefaultWriterConverter(typeof(IEnumerable));
-                        if (existing != null) { Settings.Converters.Remove(existing); }
-                        Decorator.Enclose(Settings.Converters).AddEnumerableConverter(flattenItems: true);
+                        var converters = Decorator.Enclose(Settings.Converters);
+                        while (true)
+                        {
+                            var existing = converters.FirstOrDefaultWriterConverter(typeof(IEnumerable));
+                            if (existing == null) { break; }
+                            Settings.Converters.Remove(existing);
+                        }
+                        converters.AddEnumerableConverter(flattenItems: true);
                     }
                     Decorator.Enclose(Settings.Converters)
                         .AddExceptionConverter(SensitivityDetails.HasFlag(FaultSensitivityDetails.StackTrace), SensitivityDetails.HasFlag(FaultSensitivityDetails.Data))