C#: Extension Methods not accessible with aliased using directive -

the following code compiles:

using microsoft.sharepoint.client  class dummy() {     void dummyfunction(clientcontext ctx, listcollection lists)     {         context.load(lists, lc => lc.include(l => l.defaultviewurl);     } } 

however, when switching aliased using, there problem include function, extension method:

using sp = microsoft.sharepoint.client  class dummyaliased() {     void dummyfunction(sp.clientcontext ctx, sp.listcollection lists)     {         /* not compile: */         context.load(lists, lc => lc.include(l => l.defaultviewurl);         /* compiles (not using function generic) */         context.load(lists, lc => sp.clientobjectqueryableextension.include(lc, l => l.defaultviewurl));     } } 

the include function can still used, not extension method. there way use extension method without un-aliasing using directive?

not before c# 6... in c# 6 can use:

using static microsoft.sharepoint.client.clientobjectqueryableextension;  using sp = microsoft.sharepoint.client; 

the first of these pull in just static members of clientobjectqueryableextension available, without rest of namespace.