Visual Studio or Resharper functionality for placement of using directives
As of version 8.2, this has moved. It is now here:
Within Visual Studio
Resharper -> Options...
Then in the Options dialog
Code Editing -> C# -> Namespace Imports -> Insert using directives when necessary -> Add using directive to the deepest scope
UPDATE - ReSharper 2016.1: This option is now moved to Code Editing → C# → Code Style → Add 'using' directive to the deepest scope
Have you tried the ReSharper option:
Languages → C# → Formatting Style → Namespace Imports → Add using directive to the deepest scope
I'm not sure whether R#'s code cleanup will reorder the existing ones for you though.
In ReSharper 2020, go to Options and then:
Code Editing
→C#
→Syntax Style
→Add 'using' directive to deepest scope