After expanding its functionality in previous releases, ReSharper 4.5 shifts focus to the issues of performance and memory usage. Making the tool agile, robust and responsive - and a bit smarter still - is the main idea behind ReSharper 4.5.
ReSharper 4.5 also brings a wide-ranging set of improvements that go beyond performance enhancements:
Performance and memory consumption: When working on large solutions, you will feel a great deal of difference between ReSharper 4.0 and 4.5
New solution-wide warnings and suggestions: Analyze usage of non-private types and type members within your whole solution (or don't!)
Visual Basic 9 support: ReSharper's cross-language refactorings and editing experience enhancements now fully support VB9 code
Improved setup for naming conventions, which are now supported by all ReSharper features
New Inline Field refactoring and enhancements in existing refactorings
Go to Implementation: Go from the usage of a class or method straight to its implementation, bypassing its declaration