Question

Normally, I use the following code to serialize object to XML file. Everyday, I have about 100-1000 new items to be added into this list in different period of time.

var xmlSerializer = new XmlSerializer(typeof(List<TestModel>));
xmlSerializer.Serialize(stream, list);

How to append new item into serialized xml data without deserialize old data?

Thanks,

Answer 1

You can serialize objecto to memory and append to existing file. Also take a look at MS article Efficient Techniques for Modifying Large XML Files which shows two techniques both applicable in your situation.