If there is one feature synonymous with .NET Framework 3.5, it is . Before 3.5, data access was a fragmented experience. Interacting with SQL databases required ADO.NET and string-based SQL queries; XML data required XSLT or XPath; and in-memory collections required complex loops and delegates.
While it bears the version number 3.5, it is a standalone, clean-slate release. Instead, it is built incrementally on top of .NET Framework 2.0 and 3.0. This means: .NET Framework 3.5
While no one should start a new greenfield project on .NET 3.5 today, knowing how to enable it via Windows Features, repair it with DISM, and secure it with modern policies will save countless hours of frustration. The framework may be from 2007, but for many critical systems, it remains as essential as the day it launched. If there is one feature synonymous with