c# - Reflection methods fail when types are in other assembly -

i'm making little tool analyze code dependencies recursively. found problem: if try member of class signature contains reference dll method fails. example, if have simple class in main.exe

public class mainclass  {     public mainclass () {         foo();     }      public containedclass getpublicclass () {         return new containedclass ();     }  } 

and containedclass defined in other file refers.dll, when try following code throw filenotfoundexception in met3.returntype() method cause .net not find refers.dll.

assembly assem = assembly.loadfile(@"d:\dir\main.exe"); type typ =  assem.gettype ("multiplereference.mainclass"); methodinfo met3 = typ.getmethod ("getpublicclass"); met3.returntype.tostring (); 

is there way indicate search dll?

thanks in advance , sorry english.

use loadfrom instead of loadfile because resolve , load dependent assemblies. quoting documentation:

use loadfile method load , examine assemblies have same identity, located in different paths. loadfile not load files loadfrom context, , not resolve dependencies using load path, loadfrom method does. loadfile useful in limited scenario because loadfrom cannot used load assemblies have same identities different paths; load first such assembly.