vb.net - COM Error in ADODB connection -


in console application have simple database connectivity code. shows com exception error in adodb.connection line.

  module module1             sub main()             dim cn new adodb.connection() //error              cn.connectionstring = "provider=sqloledb;server=localhost;database=northwind;uid=<username>"             cn.open()         end sub         end module

i added microsoft activex data objects 2.8 library in reference,but error appeared. changes library microsoft activex data objects 6.0 library, still shows error. when run applicaiton first shows 1 error-

the procedure entry point _loadversionedresourceex@16 not located in msdart.dll.

and 

com exception unhandled: retrieving com class factory component clsid {00000514-0000-0010-8000-00aa006d2ea4} failed due following error: 8007007f specified procedure not found. (exception hresult: 0x8007007f).

im using windows 7, visual studio 2010, vb.net

probably have obsolete msdart.dll file in %windir%\system32

replace correct msdart.dll (v2.71.9031.4) file located in %windir%\system32\dllcache folder.

another work around include microsoft data access components library in project > add reference > com tab


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