private void WriteSystemExceptionRequiredValues(XmlWriterDelegator writer, object value, XmlObjectSerializerWriteContext context)
        {
            Dictionary <string, object> exceptionFields = GetExceptionFieldValues((Exception)value);

            object val;

            foreach (string key in exceptionFields.Keys)
            {
                if (!exceptionFields.TryGetValue(key, out val))
                {
                    continue;
                }

                Type      fieldType;
                FieldInfo FieldFind = Globals.TypeOfException.GetField(key, BindingFlags.Instance | BindingFlags.NonPublic);
                if (FieldFind == null)
                {
                    val       = null;        // need to nullify because the private fields that are necessary in Exception have changed.
                    fieldType = typeof(int); // can be any type, it doesn't matter. field type will be used to recover a contract, but the type won't be utilized.
                }
                else
                {
                    fieldType = FieldFind.FieldType;
                }

                string fieldDisplayName;
                if (EssentialExceptionFields.TryGetValue(key, out fieldDisplayName))
                {
                    writer.WriteStartElement(fieldDisplayName, "");
                }
                else
                {
                    writer.WriteStartElement(key, "");
                }

                DataContract fieldDataContract = context.GetDataContract(fieldType);
                if (val != null && fieldDataContract != null && !TryCheckIfNoCountIDictionary(fieldType, val))
                {
                    if (!TryWritePrimitive(fieldType, val, writer, context))
                    {
                        writer.WriteAttributeString(Globals.XsiPrefix, "type", null, "a:" + fieldDataContract.StableName.Name);
                        writer.WriteXmlnsAttribute("a", new XmlDictionary(1).Add(fieldDataContract.StableName.Namespace));
                        fieldDataContract.WriteXmlValue(writer, val, context);
                    }
                }
                else
                {
                    writer.WriteAttributeString(Globals.XsiPrefix, "nil", null, "true");
                }
                writer.WriteEndElement();
            }
        }
        private void WriteExceptionValue(XmlWriterDelegator writer, object value, XmlObjectSerializerWriteContext context)
        {
            /*
             * Every private field present in System.Exception that is serialized in the thick framework is also serialized in this method.
             * For classes that inherit from System.Exception all public properties are serialized.
             * The reason that the Members property is not used here to get the properties to serialize is because Members contains only the properties with setters.
             */

            Type type = value.GetType();

            writer.WriteXmlnsAttribute("x", new XmlDictionary(1).Add(Globals.SchemaNamespace));
            WriteSystemExceptionRequiredValues(writer, value, context);
            PropertyInfo[] props = type.GetProperties();
            foreach (PropertyInfo prop in props)
            {
                //Properties in System.Exception are handled in the call to WriteSystemExceptionRequiredValues, we don't want to repeat these properties.
                if (PropertyIsSystemExceptionProperty(prop))
                {
                    continue;
                }

                writer.WriteStartElement(prop.Name, "");
                DataContract propDataContract = context.GetDataContract(prop.PropertyType);
                if (prop.GetValue(value) != null && propDataContract != null && !TryCheckIfNoCountIDictionary(prop.PropertyType, prop.GetValue(value)))
                {
                    if (!TryWritePrimitive(prop.PropertyType, prop.GetValue(value), writer, context))
                    {
                        writer.WriteAttributeString(Globals.XsiPrefix, "type", null, "a:" + propDataContract.StableName.Name);
                        writer.WriteXmlnsAttribute("a", new XmlDictionary(1).Add(propDataContract.StableName.Namespace));
                        context.SerializeWithoutXsiType(propDataContract, writer, prop.GetValue(value), prop.PropertyType.TypeHandle);
                    }
                }
                else
                {
                    writer.WriteAttributeString(Globals.XsiPrefix, "nil", null, "true");
                }
                writer.WriteEndElement();
            }
        }