Catel.Runtime.Serialization.Xml.DataContractSerializerFactory.GetKnownTypesViaAttributes C# (CSharp) Method

        protected virtual Type[] GetKnownTypesViaAttributes(Type type)
        {
            Argument.IsNotNull("type", type);

            string typeName = type.AssemblyQualifiedName;
            if (string.IsNullOrWhiteSpace(typeName))
            {
                return new Type[] { };
            }

            return _knownTypesByAttributesCache.GetFromCacheOrFetch(typeName, () =>
            {
                var additionalTypes = new List<Type>();
                var knownTypeAttributes = type.GetCustomAttributesEx(typeof(KnownTypeAttribute), true);
                foreach (var attr in knownTypeAttributes)
                {
                    var ktattr = attr as KnownTypeAttribute;
                    if (ktattr != null)
                    {
                        if (ktattr.MethodName != null)
                        {
                            var mi = type.GetMethodEx(ktattr.MethodName, BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public);

                            // this can be null because we are also getting here through the recursive behaviour
                            // of GetCustomAttributesEx. We are getting at this point once per class derived from a
                            // base class having a KnownType() with a method. This can be ignored
                            if (mi != null)
                            {
                                var types = mi.Invoke(null, null) as IEnumerable<Type>;
                                if (types != null)
                                {
                                    additionalTypes.AddRange(types);
                                }
                            }
                        }
                        else
                        {
                            additionalTypes.Add(ktattr.Type);
                        }
                    }
                }

                return additionalTypes.ToArray();
            });
        }