System.Xml.Serialization.XmlSerializationILGen.GenerateSerializerContract C# (CSharp) Method

        internal void GenerateSerializerContract(string className, XmlMapping[] xmlMappings, Type[] types, string readerType, string[] readMethods, string writerType, string[] writerMethods, Dictionary<string, string> serializers)
        {
            TypeBuilder serializerContractTypeBuilder = CodeGenerator.CreateTypeBuilder(
                _moduleBuilder,
                "XmlSerializerContract",
                TypeAttributes.Public | TypeAttributes.BeforeFieldInit,
                typeof(XmlSerializerImplementation),
                Array.Empty<Type>()
                );

            ilg = new CodeGenerator(serializerContractTypeBuilder);
            PropertyBuilder propertyBuilder = serializerContractTypeBuilder.DefineProperty(
                "Reader",
                PropertyAttributes.None,
                typeof(XmlSerializationReader),
                null, null, null, null, null);
            ilg.BeginMethod(
                typeof(XmlSerializationReader),
                "get_Reader",
                Array.Empty<Type>(),
                Array.Empty<string>(),
                CodeGenerator.PublicOverrideMethodAttributes | MethodAttributes.SpecialName);
            propertyBuilder.SetGetMethod(ilg.MethodBuilder);
            ConstructorInfo ctor = CreatedTypes[readerType].GetConstructor(
                CodeGenerator.InstanceBindingFlags,
                Array.Empty<Type>()
                );
            ilg.New(ctor);
            ilg.EndMethod();

            ilg = new CodeGenerator(serializerContractTypeBuilder);
            propertyBuilder = serializerContractTypeBuilder.DefineProperty(
                "Writer",
                PropertyAttributes.None,
                typeof(XmlSerializationWriter),
                null, null, null, null, null);
            ilg.BeginMethod(
                typeof(XmlSerializationWriter),
                "get_Writer",
                Array.Empty<Type>(),
                Array.Empty<string>(),
                CodeGenerator.PublicOverrideMethodAttributes | MethodAttributes.SpecialName);
            propertyBuilder.SetGetMethod(ilg.MethodBuilder);
            ctor = CreatedTypes[writerType].GetConstructor(
                CodeGenerator.InstanceBindingFlags,
                Array.Empty<Type>()
                );
            ilg.New(ctor);
            ilg.EndMethod();

            FieldBuilder readMethodsField = GeneratePublicMethods(nameof(readMethods), "ReadMethods", readMethods, xmlMappings, serializerContractTypeBuilder);
            FieldBuilder writeMethodsField = GeneratePublicMethods("writeMethods", "WriteMethods", writerMethods, xmlMappings, serializerContractTypeBuilder);
            FieldBuilder typedSerializersField = GenerateTypedSerializers(serializers, serializerContractTypeBuilder);
            GenerateSupportedTypes(types, serializerContractTypeBuilder);
            GenerateGetSerializer(serializers, xmlMappings, serializerContractTypeBuilder);

            // Default ctor
            ConstructorInfo baseCtor = typeof(XmlSerializerImplementation).GetConstructor(
                CodeGenerator.InstanceBindingFlags,
                Array.Empty<Type>()
                );
            ilg = new CodeGenerator(serializerContractTypeBuilder);
            ilg.BeginMethod(
                typeof(void),
                ".ctor",
                Array.Empty<Type>(),
                Array.Empty<string>(),
                CodeGenerator.PublicMethodAttributes | MethodAttributes.RTSpecialName | MethodAttributes.SpecialName
                );
            ilg.Ldarg(0);
            ilg.Load(null);
            ilg.StoreMember(readMethodsField);
            ilg.Ldarg(0);
            ilg.Load(null);
            ilg.StoreMember(writeMethodsField);
            ilg.Ldarg(0);
            ilg.Load(null);
            ilg.StoreMember(typedSerializersField);
            ilg.Ldarg(0);
            ilg.Call(baseCtor);
            ilg.EndMethod();
            // Instantiate type
            Type serializerContractType = serializerContractTypeBuilder.CreateTypeInfo().AsType();
            CreatedTypes.Add(serializerContractType.Name, serializerContractType);
        }