Fix using directives.

Author: JimBobSquarePants

.editorconfig

@@ -168,7 +168,7 @@ csharp_prefer_braces = true:warning
 csharp_prefer_simple_using_statement = true:suggestion
 dotnet_diagnostic.IDE0063.severity = suggestion
 # 'using' directive preferences
-csharp_using_directive_placement = inside_namespace:warning
+csharp_using_directive_placement = outside_namespace:warning
 # Modifier preferences
 csharp_prefer_static_local_function = true:warning