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cant add reference to asp.net c# web application

  1. im working on visual studio 2010 and .net ver 2
  2. im adding a normal dll such as ajaxcontroltoolkit or sqlserversmo and ...

when i add reference to my project get this prompt

could not be added.Please make sure that the file is accessible and that it is a valid assembly or COM component.

after many search i try the TLIMB.exe and STrongname but get this error my.dll is not a valid type of library

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  • Exactly how did you add it? Commented Dec 29, 2012 at 8:40
  • i add my reference project>reference >add reference and browse my dll to add Commented Dec 29, 2012 at 8:43

1 Answer 1

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It seems that the underlying COM component (ie: SQL Server SMO) wrapped in the NET assembly you're trying to add isn't registered. Try reinstalling it first.

Other simpler idea: are you running VS as admin?

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yes vs as admin ,i fix that with user built dll in same machine

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