c# - Implementation of Interface Invalid -

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i've been trying make module, command-line-like application. each module can hold multiple commands. example, "module a" can have commands "exit" , "echo". i'm using following code load , initialize modules...

foreach (string filename in directory.getfiles(path.combine(appdomain.currentdomain.basedirectory, @"modules"), "*.dll")) {     assembly asm = assembly.loadfrom(filename);     foreach (type asmtype in asm.gettypes())     {         if (asmtype.getinterface("icommandmodule") != null)         {             object commandobject = activator.createinstance(asmtype);             icommandmodule commandmodule;             if (commandobject icommandmodule)             {                 commandmodule = (icommandmodule)commandobject;             }             else             {                 throw new exception("commandobject not valid icommandmodule.");             }             ...

i know fact module loading (core.dll) in compliance icommandmodule interface. when make sure if (commandobject icommandmodule) throws exception. when removed if statement alltogether, told me unable cast commandobject icommandmodule.

your application may finding assembly icommandmodule in 2 different directories. assemblies may same, because in different directories type system sees them different.


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