c# - Winrt app failed on app cert kit because of financial.dll -

i working on winrt app have financial calculation involved. searched on net , find financial.dll have financial functions in excel. used in app , desired result. when test app on app cert kit failed because of it.

error found: supported apis test detected following errors: o api system.net.downloadstringcompletedeventhandler in system, publickeytoken=b77a5c561934e089 not supported application type. financial.dll calls api. o api system.net.downloadstringcompletedeventargs in system, publickeytoken=b77a5c561934e089 not supported application type. financial.dll calls api. o api system.runtime.serialization.serializationinfo in mscorlib, publickeytoken=b77a5c561934e089 not supported application type. financial.dll calls api. o api system.converter`2 in mscorlib, publickeytoken=b77a5c561934e089 not supported application type. financial.dll calls api. o api system.threading.parameterizedthreadstart in mscorlib, publickeytoken=b77a5c561934e089 not supported application type. financial.dll calls api.

there lots of same error.
there other api used same functionality or fix issue?

assuming developing windows store app, there limited subset of .net framework available use. assembly using evidently built on full .net framework , not valid windows store app component.

if have source code financial.dll can try port sandboxed version of .net available winrt. if don't have source code, can't use assembly @ , need find alternative. in case, perhaps can edit question specify which financial functions need , perhaps can suggest alternatives you.

edit

for functions listed, there's c/c++ source code list here.