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I have tried these application for yahoo Login, but it is returning Step by Step Guide to Delicious OAuth API[^] and Implementing Yahoo! Contact Reader Using ASP.NET[^] both these application generating same exception.
Exception: The remote server returned an error: (401) Unauthorized.

Can you help to short out the the reason of generating this exception.

I have tried my code for yahoo login but all code is generating same exception.
What is the reason of this exception and how can I resolve this issue.

I have checked my yahoo apps consumer key and and secret key all are correct but it still returning the same error.

Updated 7-Nov-11 15:57pm

In the article[^] forum someone already asked this question[^] and posted an answer[^] himself.

So did you check the credentials being used?
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aryan2010 6-Nov-11 8:46am    
I have supplied correct consumer key and secret key of my yahoo application but
still it is generating same exception.

I have downloaded this sample from this link

and i have not changed the anything.

but when i ran this application it is generating same exception
The most obvious reason is: you are not providing valid login information.
Try it manually - cut and paste the exact data from you program - and see if it works at all.
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