System.Configuration.ConfigurationElement.ApplyInstanceAttributes C# (CSharp) Метод

        private static void ApplyInstanceAttributes(object instance) {
            
            Debug.Assert(instance is ConfigurationElement, "instance is ConfigurationElement");
            Type type = instance.GetType();

            foreach (PropertyInfo propertyInformation in type.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)) {

                ConfigurationPropertyAttribute attribProperty =
                    Attribute.GetCustomAttribute(propertyInformation,
                                                 typeof(ConfigurationPropertyAttribute)) as ConfigurationPropertyAttribute;

                if (attribProperty != null)
                {
                    Type propertyType = propertyInformation.PropertyType;
                    // Collections need some customization when the collection attribute is present
                    if (typeof(ConfigurationElementCollection).IsAssignableFrom(propertyType)) {
                        ConfigurationCollectionAttribute attribCollection =
                            Attribute.GetCustomAttribute(propertyInformation,
                                                            typeof(ConfigurationCollectionAttribute)) as ConfigurationCollectionAttribute;

                        // If none on the property - see if there is an attribute on the collection type itself
                        if (attribCollection == null) {
                            attribCollection =
                                Attribute.GetCustomAttribute(propertyType,
                                                                typeof(ConfigurationCollectionAttribute)) as ConfigurationCollectionAttribute;
                        }

                        ConfigurationElementCollection coll = propertyInformation.GetValue(instance, null) as ConfigurationElementCollection;
                        if (coll == null) {
                            throw new ConfigurationErrorsException(SR.GetString(SR.Config_element_null_instance,
                                propertyInformation.Name, attribProperty.Name));
                        }

                        // If the attribute is found - get the collection instance and set the data from the attribute
                        if (attribCollection != null) {
                            if (attribCollection.AddItemName.IndexOf(',') == -1) {
                                coll.AddElementName = attribCollection.AddItemName;
                            }

                            coll.RemoveElementName = attribCollection.RemoveItemName;

                            coll.ClearElementName = attribCollection.ClearItemsName;
                        }
                    }
                    else if (typeof(ConfigurationElement).IsAssignableFrom(propertyType)) {
                        // Nested configuration element - handle recursively
                        object element = propertyInformation.GetValue(instance, null);
                        if (element == null) {
                            throw new ConfigurationErrorsException(SR.GetString(SR.Config_element_null_instance,
                                propertyInformation.Name,attribProperty.Name));
                        }
                        
                        ApplyInstanceAttributes(element);
                    }
                }
            }
        }