If you open the package zip files you can see what changes the patch contains. There are usuaylly just two types of changes
- Configuration file changes, such as web.config and composite.config. These changes will go in and add, edit or remove entries from these files
-
New or changed files. These will always just be added or overwrite existing files - no merging going on here. This is usually dll-files in the /bin folder or js/aspx/ascx files under /composite