SA1208 : False Positive

[anthonypetre]

If the first token of a namespace begins with the string "System" then it is interpreted as a System namespace. For example, the following would be considered a System namespace under this rule:
using Systematics.Media.UI.ButtonIcons;

The Visual Studio setting "Place 'System' directives first when sorting usings" does NOT put these type of usings first, raising the false positive.

I propose tokenizing the namespace strings by '.' and looking for an exact match of "System" or "global::System" in the first token string to calculate isFirstSystem and isSecondSystem for CompareOrderOfUsingDirectives().