public static MultipartSerialization BuildMultipartSerialization()

in src/AutoRest.CSharp/Common/Output/Builders/SerializationBuilder.cs [699:721]
22 lines of code
16 McCabe index (conditional complexity)

        public static MultipartSerialization BuildMultipartSerialization(InputType? inputType, CSharpType valueType, bool isCollectionElement, SerializationFormat serializationFormat, ValueExpression memberValueExpression)
        {
            /*TODO: need to update to use InputType to identify if it is a Multipart File or not. Current we will set contentType for Bytes and Stream*/
            if (inputType != null && inputType is InputPrimitiveType { Kind: InputPrimitiveTypeKind.Bytes } && valueType.IsFrameworkType && valueType.FrameworkType == typeof(BinaryData))
            {
                var valueSerialization = new MultipartValueSerialization(valueType, serializationFormat, valueType.IsNullable || isCollectionElement);
                valueSerialization.ContentType = "application/octet-stream"; //TODO: need to set the right content type from InputType
                return valueSerialization;
            }
            if (inputType != null && inputType.Name == InputPrimitiveType.Stream.Name && valueType.IsFrameworkType && valueType.FrameworkType == typeof(Stream))
            {
                var valueSerialization = new MultipartValueSerialization(valueType, serializationFormat, valueType.IsNullable || isCollectionElement);
                valueSerialization.ContentType = "application/octet-stream"; //TODO: need to set the right content type from InputType
                return valueSerialization;
            }
            return inputType switch
            {
                InputListType listType => new MultipartArraySerialization(valueType, BuildMultipartSerialization(listType.ValueType, valueType.ElementType, true, serializationFormat, new VariableReference(valueType.ElementType, "item")), valueType.IsNullable || (isCollectionElement && !valueType.IsValueType)),
                InputDictionaryType dictionaryType => new MultipartDictionarySerialization(valueType, BuildMultipartSerialization(dictionaryType.ValueType, valueType.ElementType, true, serializationFormat, memberValueExpression), valueType.IsNullable || (isCollectionElement && !valueType.IsValueType)),
                InputNullableType nullableType => BuildMultipartSerialization(nullableType.Type, valueType, isCollectionElement, serializationFormat, memberValueExpression),
                _ => new MultipartValueSerialization(valueType, serializationFormat, valueType.IsNullable || isCollectionElement)// nullable CSharp type like int?, Etag?, and reference type in collection
            };
        }