From my DLL, I want to return some value in this format ...

test("Error",0)
test("Run",1)

and some more ....
which one should I use ... Collections or Hashtables ?

Also, right now I am returning hashtable from my DLL to form, and at the form side, I have declared a hashtable to take this return value in, but its always showing it as nothing for some reason, it returns the value from the DLL but on form side it becomes nothing automatically ????