running svn update from .net

If I run svn update from command prompt everything works fine but if I try to run it from a .net process I get the following error.
Eventhough I setup .net to run as the same user.
If i'm getting the below error I think it's because its actually trying to use svn under a different user that doesnt have the info saved. How can I save the login for whichever user .net is trying to run under...

C:\path>svn update
 Error validating server certificate for 'http://mysvnsite':
 - The certificate is not issued by a trusted authority. Use the
   fingerprint to validate the certificate manually!
Certificate information:
 - Hostname: mysvnsite
 - Valid: from Wed, 03 Dec 2008 05:22:17 GMT until Thu, 08 Dec 2011 05:22:17 GMT
 - Issuer: Myissuer
 - Fingerprint:
(R)eject, accept (t)emporarily or accept (p)ermanently? svn: OPTIONS of 'mysvnsite': Server certificate verification failed: issuer is not trusted (https://mysvnsite)

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You could impersonate to that user. But I guess the problem here is to do with the certificate If i get it right.
NewtonianBAuthor Commented:
Thanks SriVaddadi, something else must be wrong because I just checked the identity of the running process in release mode and it was the same user i am logged in to.
SO anyways I need to figure out how to save and accept the certificate through .net
I would suggest to see if you could pass the certificate through svn update command. As far as I know we cannot.

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