Dispose Patterns

When writing customized SharePoint code you need to be aware of the scope and context of each SPSite, SPWeb objects lifetime. When objects are created and destroyed in the same method or iteration scope (foreach or do/while loop) they are the easiest to clean handle. Things become more complex to review when developers create objects in one method and dispose in another. Areas to be aware of are assigning objects to class variables or static/global variables which may hold on to the object reference across method calls. The content in this blog post is a combination of Product Group Guidance along with any edge cases that have been discovered in the field through support incidents.