[Syntax rule] The static modifier should not be applied to an interface It was possible to write static interface IMyInterface {}, but the static modifier had no effect because it makes no sense in this context. Sometime after Microsoft Dynamics AX 2009 the X++ compiler might stop allowing the static modifier on interface declarations. For more information, see Interfaces Overview. [Area] 
Modifiers
E s c a p e
E x c e p t i o n s
I n h e r i t a n c e
I n t e r f a c e s
M o d i f i e r s
P a r a m e t e r s
P r e p r o c e s s o r