filehelpers - Create FileHelperEngine from Type variable -

i attempting create instance of filehelperengine<> using generic type. example works list

    public static ilist createlist(type type)     {         var genericlisttype = typeof(list<>).makegenerictype(type);         return (ilist)activator.createinstance(genericlisttype);     } 

is possible similar filehelperengine<>?

i tried

    public static filehelperengine createfilehelperengine(type type)     {         var genericfilehelperenginetype = typeof (filehelperengine<>).makegenerictype(type);         return (filehelperengine)activator.createinstance(genericfilehelperenginetype);     } 

and error

unable cast object of type 'filehelpers.filehelperengine`1[nachaparser.model.entrydetail.ppdentrymodel]' type 'filehelpers.filehelperengine'.

this not work because attempting go generic engine standard engine. generic engine not inherit standard engine can't directly cast.

the following code should work you:

    public static filehelperengine<t> createfilehelperengine<t>() t : class     {         var genericfilehelperenginetype = typeof(filehelperengine<>).makegenerictype(typeof(t));         return (filehelperengine<t>)activator.createinstance(genericfilehelperenginetype);     } 

the problem need have type of t not type variable as passed generic argument. unfortunately, generic engine based of enginebase<t> ifilehelperengine<t> interface implements can never filehelperengine<t> filehelperengine.

your other option use:

    public static filehelperengine createfilehelperengine(type type)     {         if (!type.isclass)             throw new invalidcastexception("cannot use '" + type.fullname + "' not class");          return new filehelperengine(type);     }