Fastest way to add new node to end of an xml?

Question

I have a large xml file (approx. 10 MB) in following simple structure:

   .......
   .......         


        

Answer 1

I would use XmlDocument or XDocument to Load your file and then manipulate it accordingly.

I would then look at the possibility of caching this XmlDocument in memory so that you can access the file quickly.

What do you need the speed for? Do you have a performance bottleneck already or are you expecting one?