asp.net core - vNext Owin Middleware -

i have simple middleware:

public class middlewareinterceptor {     requestdelegate _next;     public middlewareinterceptor(requestdelegate next)     {         _next = next;     }      public task invoke(httpcontext ctx)     {         ctx.response.writeasync("<h2>from somemiddleware</h2>");         return _next(ctx);     } } 

and in startup.cs configure method, hook so:

app.usemiddleware<middlewareinterceptor>(); 

the above builds , app seems run fine, breakpoint in interceptor invoke method never hits. , likewise, there never output. tried debug.writeline also.

now, tried method:

public class middlewareinterceptor : owinmiddleware {     public middlewareinterceptor(owinmiddleware next) : base(next){}      public override async task invoke(iowincontext context)     {         debug.writeline(context.request.uri.tostring());         await next.invoke(context);     } } 

and in startup.cs configure method, hook so:

app.use(next => new middlewareinterceptor(next).invoke); 

unfortunately, base owinmiddleware constructor looking next owinmiddleware parameter, unlike ye olde requestdelegate. app.use instantiation of middlewareinterceptor fails because next of type requestdelegate.

lastly, have tried inline function directly in configure method never hits breakpoint:

app.use(async (ctx, next) => {     system.diagnostics.debug.writeline("hello");     await next(); }); 

so stands, seems cant make basic middleware interceptor using owin. missing?

what order of aforementioned middleware in pipeline? make sure executes before terminate request part of pipeline; eg. usemvc();