System.Xml.Serialization.TempAssembly.LoadGeneratedAssembly C# (CSharp) Method

        internal static Assembly LoadGeneratedAssembly(Type type, string defaultNamespace, out XmlSerializerImplementation contract) {
            Assembly serializer = null;
            contract = null;
            string serializerName = null;
            bool logEnabled = DiagnosticsSwitches.PregenEventLog.Enabled;

            // check to see if we loading explicit pre-generated assembly
            object[] attrs = type.GetCustomAttributes(typeof(XmlSerializerAssemblyAttribute), false);
            if (attrs.Length == 0) {
                // Guess serializer name: if parent assembly signed use strong name 
                AssemblyName name = GetName(type.Assembly, true);
                serializerName = Compiler.GetTempAssemblyName(name, defaultNamespace);
                // use strong name 
                name.Name = serializerName;
                name.CodeBase = null;
                name.CultureInfo = CultureInfo.InvariantCulture;
                try {
                    serializer = Assembly.Load(name);
                }
                catch (Exception e) {
                    if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException) {
                        throw;
                    }
                    byte[] token = name.GetPublicKeyToken();
                    if (token != null && token.Length > 0) {
                        // the parent assembly was signed, so do not try to LoadWithPartialName
                        return null;
                    }
#pragma warning disable 618
                    serializer = Assembly.LoadWithPartialName(serializerName, null);
#pragma warning restore 618
                }
                catch {
                    return null;
                }
                if (serializer == null) {
                    return null;
                }
                if (!IsSerializerVersionMatch(serializer, type, defaultNamespace, null)) {
                    return null;
                }
            }
            else {
                XmlSerializerAssemblyAttribute assemblyAttribute = (XmlSerializerAssemblyAttribute)attrs[0];
                if (assemblyAttribute.AssemblyName != null && assemblyAttribute.CodeBase != null)
                    throw new InvalidOperationException(Res.GetString(Res.XmlPregenInvalidXmlSerializerAssemblyAttribute, "AssemblyName", "CodeBase")); 

                // found XmlSerializerAssemblyAttribute attribute, it should have all needed information to load the pre-generated serializer
                if (assemblyAttribute.AssemblyName != null) {
                    serializerName = assemblyAttribute.AssemblyName;
#pragma warning disable 618
                    serializer = Assembly.LoadWithPartialName(serializerName, null);
#pragma warning restore 618
                }
                else if (assemblyAttribute.CodeBase != null && assemblyAttribute.CodeBase.Length > 0) {
                    serializerName = assemblyAttribute.CodeBase;
                    serializer = Assembly.LoadFrom(serializerName);
                }
                else {
                    serializerName = type.Assembly.FullName;
                    serializer = type.Assembly;
                }
                if (serializer == null) {
                    throw new FileNotFoundException(null, serializerName); 
                }
            }
            Type contractType = GetTypeFromAssembly(serializer, "XmlSerializerContract");
            contract = (XmlSerializerImplementation)Activator.CreateInstance(contractType);
            if (contract.CanSerialize(type))
                return serializer;

            return null;
        }
        

        public XmlSerializer(Type type, string?defaultNamespace)
        {
            if (type == null)
            {
                throw new ArgumentNullException(nameof(type));
            }

            DefaultNamespace = defaultNamespace;
            _rootType        = type;

            _mapping = GetKnownMapping(type, defaultNamespace) !;
            if (_mapping != null)
            {
                _primitiveType = type;
                return;
            }
            _tempAssembly = s_cache[defaultNamespace, type];
            if (_tempAssembly == null)
            {
                lock (s_cache)
                {
                    _tempAssembly = s_cache[defaultNamespace, type];
                    if (_tempAssembly == null)
                    {
                        {
                            XmlSerializerImplementation?contract = null;
                            Assembly?assembly = TempAssembly.LoadGeneratedAssembly(type, defaultNamespace, out contract);
                            if (assembly == null)
                            {
                                if (Mode == SerializationMode.PreGenOnly)
                                {
                                    AssemblyName name           = type.Assembly.GetName();
                                    var          serializerName = Compiler.GetTempAssemblyName(name, defaultNamespace);
                                    throw new FileLoadException(SR.Format(SR.FailLoadAssemblyUnderPregenMode, serializerName));
                                }

                                // need to reflect and generate new serialization assembly
                                XmlReflectionImporter importer = new XmlReflectionImporter(defaultNamespace);
                                _mapping      = importer.ImportTypeMapping(type, null, defaultNamespace);
                                _tempAssembly = GenerateTempAssembly(_mapping, type, defaultNamespace) !;
                            }
                            else
                            {
                                // we found the pre-generated assembly, now make sure that the assembly has the right serializer
                                // try to avoid the reflection step, need to get ElementName, namespace and the Key form the type
                                _mapping      = XmlReflectionImporter.GetTopLevelMapping(type, defaultNamespace);
                                _tempAssembly = new TempAssembly(new XmlMapping[] { _mapping }, assembly, contract);
                            }
                        }
                    }
                    s_cache.Add(defaultNamespace, type, _tempAssembly);
                }
            }
            if (_mapping == null)
            {
                _mapping = XmlReflectionImporter.GetTopLevelMapping(type, defaultNamespace);
            }
        }