c# - Unity interception doesn't work as expected -

i use unity aop framework, doesn't work expected. please check code below.

container.registertype<iperson, person>(new interceptor<transparentproxyinterceptor>(),     new interceptionbehavior<logginginterceptionbehavior>(),      new injectionconstructor(container.resolve<iplay>(), container.resolve<ieat>()));  var person = container.resolve<iperson>(); person.play(); person.eat(); ((ianimal)person).sleep(); console.read();  public imethodreturn invoke(imethodinvocation input,        getnextinterceptionbehaviordelegate getnext) {     console.writeline(string.format("invoking method {0} begin", input.methodbase));     var result = getnext()(input, getnext);     if (result.exception != null)     {         console.writeline("{0} throws exception", input.methodbase);     }     else     {         console.writeline(string.format("invoking method {0} end", input.methodbase));     }     return result; } 

when container.resolve() , ((ianimal)person) run, behavior executed, , print out

invoking method system.type gettype() begin

invoking method system.type gettype() end

i want log execute when call method explicitly. how prevent it?