ReviewBot puts System.Diagnostics.Contracts before #define

[scottcarr]

define needs to be the first thing in the file, so this is an error.

Repro: the nancy project

[scottcarr]

There's a CompilationUnitSyntaxExtension.AddUsingDirective that takes a context SyntaxNode. It tries to put the using directive in the inner most namespace that contains usings. This could potentially work.

http://source.roslyn.io/#Microsoft.CodeAnalysis.CSharp.Workspaces/Extensions/CompilationUnitSyntaxExtensions.cs,662722bbfdbce681