Up to certain extent the performance quite depends on .NET version your application is running on.
Another quick reference is Microsoft Patterns and Practices article
There’re 4 ways to read and write XML
It is pretty common to come across a scenario where we have to deal with special characters in XML. Like &, (, ), $, etc. With this fix the < be the only illeagal character.
Thoughts on YouTube TOS (II. Prohibitions):
Input images used :