Transaction Isolation Level Scopes

Question

What are the scoping rules for transaction isolation levels in SQL Server 2005? I know what the different levels mean, but not how to properly apply them outside of a manual

Answer 1

Please note there is an issue with scope of TRANSACTION LEVELS and SqlServer 2012 or earlier when high performance ADO.NET Connection Pooling is used where this can actually persist across closing of the connection:

SQL Server: Isolation level leaks across pooled connections

https://social.msdn.microsoft.com/Forums/sqlserver/en-US/916b3d8a-c464-4ad5-8901-6f845a2a3447/sql-server-2014-reseting-isolation-level?forum=sqldatabaseengine