The standard order for ``++using++`` directives is alphabetic with the exception of ``++System++`` directives, which come first for higher visibility. Using a different order may cause maintainers to overlook a directive or misunderstand what's being used.


== Noncompliant Code Example

[source,csharp]
----
using C;  // Noncompliant
using System.A.A;
using A;
using D;
using B;
using System;
using System.A;
using System.B;
----


== Compliant Solution

[source,csharp]
----
using System;
using System.A;
using System.A.A;
using System.B;
using A;
using C;
using B;
using D;
----

ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

include::message.adoc[]

include::highlighting.adoc[]

endif::env-github,rspecator-view[]